E104-BT51A CC2640R2L ble5.0 2.4GHz CC2640R2F UART to ble Slave Module PCB Antenna [IC]:CC2640R2L [Frequency]:2.402~2.480GHz [Protocol]:BLE5.0 [Distance]:50m [Size]:16*11.5mm [Product weight]:0.8g±0.1g [Introduction]:E104-BT51A is a serial port to ble ble slave node module...