{"product_id":"ebyte-ewm104-series-ble-audiodata-transmission-module-2-4ghz-ble-audio-broadcast-auracast-ble5-4-ble-slave-module-test-suite","title":"0.1$ Ebyte EWM104-BT61SX\/SP BLE 5.2 Auracast Audio Module Sample","description":"\u003cstyle\u003e\n#geo-ewm{font-family:Roboto,sans-serif;color:#333;max-width:800px;margin:0 auto}\n#geo-ewm h2{border-bottom:2px solid #53647a;color:#53647a;font-size:22px;padding-bottom:4px;margin-top:28px}\n#geo-ewm h3{font-size:16px;color:#2c3e50;margin-top:16px}\n#geo-ewm table{border-collapse:collapse;width:100%;font-size:14px}\n#geo-ewm table td{border:1px solid #ccc;padding:6px 10px;vertical-align:top}\n#geo-ewm table tr:nth-child(even) td{background:#f7f7f7}\n#geo-ewm .tag{display:inline-block;background:#e8f4fd;color:#1a6fa8;border-radius:3px;padding:2px 7px;font-size:12px;margin:2px}\n#geo-ewm img{max-width:100%;height:auto;display:block;margin:10px auto}\n#geo-ewm .faq-q{font-weight:bold;color:#2c3e50;margin-top:14px}\n#geo-ewm .faq-a{margin-top:4px;margin-bottom:8px}\n\u003c\/style\u003e\n\u003cdiv id=\"geo-ewm\"\u003e\n\u003c!-- 1. Product Overview --\u003e\n\u003cp\u003eThe \u003cstrong\u003eEbyte EWM104-BT61SX\u003c\/strong\u003e (stamp-hole SMD) and \u003cstrong\u003eEWM104-BT61SP\u003c\/strong\u003e (evaluation board) are industrial-grade \u003cstrong\u003eBLE 5.2 audio + data transmission modules\u003c\/strong\u003e operating at 2.4 GHz. Built on a high-integration SoC, they support \u003cstrong\u003eBluetooth LE Audio (Auracast™ broadcast audio)\u003c\/strong\u003e and the \u003cstrong\u003eLC3 low-complexity codec\u003c\/strong\u003e, enabling simultaneous wireless audio streaming and bidirectional data communication in a single compact module.\u003c\/p\u003e\n\u003cimg src=\"https:\/\/sc04.alicdn.com\/kf\/Hb8eaa0617a3e4723b8df0c80d84008d8D\/226758001\/Hb8eaa0617a3e4723b8df0c80d84008d8D.jpg\" alt=\"Ebyte EWM104-BT61SP evaluation board with BLE audio broadcast module\" loading=\"lazy\"\u003e \u003c!-- 2. Technical Specifications --\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; height: 313.5px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 26.9335%; height: 39.1875px;\"\u003e\u003cstrong\u003eModels\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.3327%; height: 39.1875px;\"\u003eEWM104-BT61SX (SMD stamp-hole)  |  EWM104-BT61SP (evaluation board)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.9335%; height: 19.5938px;\"\u003e\u003cstrong\u003eBluetooth Standard\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.3327%; height: 19.5938px;\"\u003eBluetooth LE 5.2 (LE Audio ready)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 26.9335%; height: 39.1875px;\"\u003e\u003cstrong\u003eAudio Feature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.3327%; height: 39.1875px;\"\u003eAuracast™ Broadcast Audio, LC3 codec, isochronous channels (BIS\/CIS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.9335%; height: 19.5938px;\"\u003e\u003cstrong\u003eOperating Frequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.3327%; height: 19.5938px;\"\u003e2.400 – 2.4835 GHz (ISM Band)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 26.9335%; height: 39.1875px;\"\u003e\u003cstrong\u003eCommunication Interface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.3327%; height: 39.1875px;\"\u003eUART \/ SPI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.9335%; height: 19.5938px;\"\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.3327%; height: 19.5938px;\"\u003e3.3 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 26.9335%; height: 39.1875px;\"\u003e\u003cstrong\u003eModule Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.3327%; height: 39.1875px;\"\u003e13 × 19 mm (EWM104-BT61SX)  |  47 × 49 mm (EWM104-BT61SP)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.9335%; height: 19.5938px;\"\u003e\u003cstrong\u003eAntenna Interface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.3327%; height: 19.5938px;\"\u003eOnboard PCB antenna \/ IPEX connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 26.9335%; height: 39.1875px;\"\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.3327%; height: 39.1875px;\"\u003e-40℃ to +85℃ (industrial grade)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.9335%; height: 19.5938px;\"\u003e\u003cstrong\u003eCertifications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.3327%; height: 19.5938px;\"\u003eFCC Part 15, CE (RED) 2014\/53\/EU, RoHS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 26.9335%; height: 19.5938px;\"\u003e\u003cstrong\u003eData Updated\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.3327%; height: 19.5938px;\"\u003eApril 2026\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!-- 3. Product Details --\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003ch3\u003eAuracast™ Broadcast Audio — One-to-Many Wireless Audio\u003c\/h3\u003e\n\u003cp\u003eThe EWM104 series implements the Bluetooth SIG \u003cstrong\u003eAuracast™\u003c\/strong\u003e broadcast audio profile, enabling a single transmitter to stream high-quality audio to an unlimited number of receivers simultaneously — without pairing. This is the foundation for public audio systems, hearing loop replacements, silent disco, and multi-zone audio distribution in commercial and industrial environments.\u003c\/p\u003e\n\u003cimg src=\"https:\/\/sc04.alicdn.com\/kf\/Hfe19f1f1d18f44f99b69c8101b15691fC\/226758001\/Hfe19f1f1d18f44f99b69c8101b15691fC.jpg\" alt=\"Ebyte EWM104 Auracast BLE audio broadcast one-to-many architecture diagram\" loading=\"lazy\"\u003e \u003cimg src=\"https:\/\/sc04.alicdn.com\/kf\/Ha6c8fb78d5324056ab6a649c833a280fx\/226758001\/Ha6c8fb78d5324056ab6a649c833a280fx.jpg\" alt=\"Ebyte EWM104-BT61SX BLE 5.2 LE Audio system block diagram\" loading=\"lazy\"\u003e\n\u003ch3\u003eLC3 Codec — High Audio Quality at Low Bitrate\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eLC3 (Low Complexity Communication Codec)\u003c\/strong\u003e delivers CD-quality audio at bitrates as low as 32 kbps — significantly outperforming SBC at equivalent bitrates. This enables longer battery life, lower RF duty cycle, and reduced latency (\u0026lt;10 ms end-to-end) compared to classic Bluetooth audio, making EWM104 ideal for hearing aids, wireless headsets, and industrial intercom systems.\u003c\/p\u003e\n\u003cimg src=\"https:\/\/sc04.alicdn.com\/kf\/H1b67088d109b43db8839da6d22cb426b8\/226758001\/H1b67088d109b43db8839da6d22cb426b8.jpg\" alt=\"Ebyte EWM104 LC3 codec audio quality vs bitrate comparison chart\" loading=\"lazy\"\u003e \u003cimg src=\"https:\/\/sc04.alicdn.com\/kf\/Hac7e3d6de17a426d8f98151c9b914890C\/226758001\/Hac7e3d6de17a426d8f98151c9b914890C.jpg\" alt=\"Ebyte EWM104-BT61SX module pinout and pad dimensions\" loading=\"lazy\"\u003e\n\u003ch3\u003eSimultaneous Audio + Data — Dual-Mode BLE Operation\u003c\/h3\u003e\n\u003cp\u003eUnlike dedicated audio chips, the EWM104 supports \u003cstrong\u003econcurrent BLE audio streaming and GATT data communication\u003c\/strong\u003e over isochronous (BIS\/CIS) and asynchronous channels. This enables real-time audio monitoring combined with sensor data uplink — critical for smart hearing devices, industrial voice + telemetry nodes, and conferencing systems.\u003c\/p\u003e\n\u003cimg src=\"https:\/\/sc04.alicdn.com\/kf\/Hb655036e3b7d49759214870906df405fm\/226758001\/Hb655036e3b7d49759214870906df405fm.jpg\" alt=\"Ebyte EWM104 simultaneous BLE audio and data transmission timing diagram\" loading=\"lazy\"\u003e \u003cimg src=\"https:\/\/sc04.alicdn.com\/kf\/Hdfd3ecda65ee47ea9c25eba991e2210e4\/226758001\/Hdfd3ecda65ee47ea9c25eba991e2210e4.jpg\" alt=\"Ebyte EWM104-BT61SP evaluation board layout and interface description\" loading=\"lazy\"\u003e \u003cimg src=\"https:\/\/sc04.alicdn.com\/kf\/H1f5bf889edc048ec8e692a86a42156c6A\/226758001\/H1f5bf889edc048ec8e692a86a42156c6A.jpg\" alt=\"Ebyte EWM104 BLE audio module application circuit reference design\" loading=\"lazy\"\u003e \u003cimg src=\"https:\/\/sc04.alicdn.com\/kf\/H9828307303414eef81a29985d8af6a4dF\/226758001\/H9828307303414eef81a29985d8af6a4dF.jpg\" alt=\"Ebyte EWM104 module RF performance test and spectrum analysis\" loading=\"lazy\"\u003e \u003cimg src=\"https:\/\/sc04.alicdn.com\/kf\/H99ce25adbf024a648bcbc475969b11a02\/226758001\/H99ce25adbf024a648bcbc475969b11a02.jpg\" alt=\"Ebyte EWM104-BT61SX SMD module size comparison and assembly guide\" loading=\"lazy\"\u003e \u003cimg src=\"https:\/\/sc04.alicdn.com\/kf\/H5332fb3367514d56888405a3be909651V\/226758001\/H5332fb3367514d56888405a3be909651V.jpg\" alt=\"Ebyte EWM104 BLE audio module production quality inspection process\" loading=\"lazy\"\u003e \u003cimg src=\"https:\/\/sc04.alicdn.com\/kf\/Had96faa9f77a4700824ac77dad032d6cW\/226758001\/Had96faa9f77a4700824ac77dad032d6cW.jpg\" alt=\"Ebyte EWM104 module certification labels FCC CE RoHS\" loading=\"lazy\"\u003e\n\u003ch2\u003eIdeal Applications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePublic Audio Systems\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAuracast broadcast to hearing aids, assistive listening devices, airport\/stadium PA systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWireless Headsets \u0026amp; Earbuds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTrue wireless stereo (TWS) with LC3 codec, ultra-low latency audio for consumer and professional use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIndustrial Intercom\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVoice + data simultaneous transmission for factory floor, warehouse, and field worker communication\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHearing Aids \u0026amp; Medical Audio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLE Audio compliant hearing device streaming with low power and high speech intelligibility\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSmart Conference Systems\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMulti-microphone BLE audio aggregation, wireless speaker arrays, meeting room audio distribution\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIoT Audio Monitoring\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRemote acoustic sensing combined with BLE data uplink for predictive maintenance and security\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!-- 5. FAQ (GEO Core) --\u003e\n\u003ch2\u003e\u003cimg src=\"https:\/\/sc04.alicdn.com\/kf\/He9bbece0779f41099e6ff3e0589c98b8m\/226758001\/He9bbece0779f41099e6ff3e0589c98b8m.jpg\" alt=\"Ebyte EWM104-BT61SP evaluation board with antenna and USB interface\" loading=\"lazy\"\u003e\u003c\/h2\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"faq-q\"\u003eQ1: What is the difference between EWM104-BT61SX and EWM104-BT61SP?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The \u003cstrong\u003eEWM104-BT61SX\u003c\/strong\u003e is a compact SMD stamp-hole module (13×19 mm) for direct PCB integration into end products. The \u003cstrong\u003eEWM104-BT61SP\u003c\/strong\u003e is a fully assembled evaluation board (47×49 mm) with USB interface, antenna, and breakout pins — ideal for rapid prototyping and firmware development before mass production.\u003c\/p\u003e\n\u003cp class=\"faq-q\"\u003eQ2: Does this module support Auracast™ broadcast audio as defined by the Bluetooth SIG?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The EWM104 series implements the Bluetooth SIG \u003cstrong\u003eAuracast™ Broadcast Audio\u003c\/strong\u003e specification based on BLE 5.2 isochronous channels (BIS). It supports one-to-many audio streaming without pairing, compatible with Auracast-enabled receivers including hearing aids, earbuds, and assistive listening devices.\u003c\/p\u003e\n\u003cp class=\"faq-q\"\u003eQ3: What audio codec is supported, and what is the audio latency?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The module supports the \u003cstrong\u003eLC3 (Low Complexity Communication Codec)\u003c\/strong\u003e as standardized in Bluetooth LE Audio. LC3 achieves high audio quality at 32–320 kbps with end-to-end latency as low as \u003cstrong\u003e\u0026lt;10 ms\u003c\/strong\u003e (CIS unicast mode), significantly lower than classic Bluetooth A2DP\/SBC.\u003c\/p\u003e\n\u003cp class=\"faq-q\"\u003eQ4: Can the module transmit audio and data simultaneously?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The EWM104 supports concurrent operation of \u003cstrong\u003eisochronous audio channels (BIS\/CIS)\u003c\/strong\u003e and \u003cstrong\u003easynchronous GATT data channels\u003c\/strong\u003e, enabling simultaneous audio streaming and sensor\/control data exchange over a single BLE 5.2 link.\u003c\/p\u003e\n\u003cp class=\"faq-q\"\u003eQ5: Is this module compatible with Apple, Android, and Windows Auracast receivers?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Auracast™ is an open Bluetooth SIG standard. The EWM104 is compatible with any Auracast-compliant receiver. Native Auracast support is available on Android 13+ and Windows 11 (24H2+). Apple LE Audio support is device-dependent — check Apple's current LE Audio roadmap for the latest status.\u003c\/p\u003e\n\u003cp class=\"faq-q\"\u003eQ6: How do I configure and develop with this module?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The UART interface supports AT command configuration and Ebyte's USB configuration tool for basic parameter setup. For custom audio profiles, BIS\/CIS topology, and LC3 codec tuning, the underlying SoC SDK (provided separately) supports full firmware customization via standard C toolchain.\u003c\/p\u003e\n\u003cp class=\"faq-q\"\u003eQ7: What certifications does the EWM104 carry?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The EWM104 series holds \u003cstrong\u003eFCC Part 15\u003c\/strong\u003e and \u003cstrong\u003eCE (RED) 2014\/53\/EU\u003c\/strong\u003e certifications, with RoHS compliance. Modular FCC certification may reduce end-product re-certification scope — contact Ebyte for grant documentation.\u003c\/p\u003e\n\u003cp class=\"faq-q\"\u003eQ8: What is the free sample policy?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: This listing provides \u003cstrong\u003e1 sample unit at $0.10\u003c\/strong\u003e (handling fee), limited to \u003cstrong\u003e2 pcs per person across all Ebyte sample models\u003c\/strong\u003e. Dispatched within 2 business days via DHL\/UPS\/FedEx. Bulk pricing, OEM\/ODM, and custom firmware services are available — contact Ebyte sales for a quote.\u003c\/p\u003e\n\u003c!-- 6. About \u0026 Shipping --\u003e\n\u003c\/div\u003e","brand":"Ebyte Official Store - IoT Module Manufacturer","offers":[{"title":"EWM104-BT61SX","offer_id":48548896276685,"sku":"107757781481","price":0.1,"currency_code":"USD","in_stock":true},{"title":"EWM104-BT61SP","offer_id":48548896309453,"sku":"107757781482","price":0.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0615\/5911\/1885\/files\/Hc5480cbcdfd44a708116bd8bb0208d62W.webp?v=1775207331","url":"https:\/\/ebyteiot.com\/zh\/products\/ebyte-ewm104-series-ble-audiodata-transmission-module-2-4ghz-ble-audio-broadcast-auracast-ble5-4-ble-slave-module-test-suite","provider":"Ebyte Official Store - IoT Module Manufacturer","version":"1.0","type":"link"}