The EWD201-470A20(AUX) long-range wireless voice transceiver is a wireless audio transmitter module developed by Chengdu Ebyte Electronics Technology Co., Ltd. based on long-range wireless transmission technology. This article mainly covers the product features, application guide, user tutorial, common problems, and solutions for the EWD201-470A20(AUX) long-range wireless voice transceiver.

I. Introduction to the EWD201-470A20(AUX) Long-Range Wireless Audio Transceiver

1. Product Overview

The EWD201-470A20(AUX) long-range wireless voice transceiver is a radio device integrating voice transmission and reception. Utilizing long-range wireless transmission technology, voice input/output can be achieved via a 3.5mm AUX interface. The transceiver employs a 16-bit/8kHz audio sampling rate, transmitting voice-quality audio. It supports one-to-many voice broadcasting, operates in the UHF band, requires no network, and with the matching antenna, achieves a communication range of up to 2km in open environments, exhibiting strong anti-interference capabilities. Suitable for outdoor long-distance voice broadcasting, forest fire prevention, parks, schools, factories, restaurant voice announcements, and other scenarios.

2. Wireless Audio Transceiver Features

Voice Broadcasting: Enables one-to-many voice broadcasting with no limit on the number of receivers;

Transmit/Receive in One: One device can function as both a receiver and a transmitter, switchable via a DIP switch;

Configurable Channels: Channels can be configured via a DIP switch; communication is possible only if channels match, simple and convenient;

Ultra-Long Range: Strong penetration capability, coverage up to 2km in open environments;

Volume Knob: Adjusts volume when used as a receiver;

Metal Casing: Durable and robust, with efficient heat dissipation, suitable for various outdoor and industrial environments;

II. Long-Distance Wireless Audio Transmitter User Guide

1. Audio Transmitter Connection

① Connect the USB power cable and the 3.5mm extension cable (TX connects to IN, RX connects to OUT);

② Connect the other end of the 3.5mm extension cable to the audio source/speaker (TX connects to the microphone/computer/mobile phone, etc., and RX connects to the speaker with an amplifier, or you can connect headphones directly).

Set the receiver's RX/TX to 1 (top) and the transmitter's RX/TX to 0 (bottom); ensure that D1~D7 on both the receiver and transmitter are set to the same (taking all 1s as an example) to enable communication.

3. Wireless Audio Transceiver Voice Transmission Usage

When the transmitter uses a computer output as input, please turn the computer volume up to 20 or higher. Activating transmission will result in a solid green indicator light, indicating normal voice communication between both sides.

When the transmitter uses a microphone as input, please increase the volume to activate transmission. A solid green indicator light will also indicate normal voice communication between both sides.

If there is no sound input from the transmitter for a period of time, it will automatically enter sleep mode.

III. Common Problems with Wireless Audio Transceivers

1. What if the indicator light on the wireless voice transmitter is not on?

If the red light is not on, try replacing the power supply. If the green light is not on, ensure that the D1~D7 DIP switches are set to the same channel, and that the RX/TX positions correspond to the transmitter and receiver.

2. Why can't the wireless audio transceiver receive sound?

Increase the input volume and check that both the transmitter and receiver are on the same channel. When testing at close range, ensure that both green indicator lights are constantly on, and simultaneously turn on the receiver's volume knob.

3. Why is the communication distance of the wireless audio transceiver short and does not reach the ideal distance?

Please check the installation location. Placing it inside a metal enclosure such as a power distribution cabinet will significantly attenuate the signal. Placing it too low will also directly affect the remote control distance. Avoid metal obstructions to achieve the optimal distance.