Wireless Bluetooth 5.0 MP3 Decoder Audio Receiver Module AUXTFUSB for Car Home Stereo Speaker DIY

Description

MP3 Bluetooth Audio ModuleUser Manual1. Product OverviewThis is a mini Bluetooth audio receiver and decoder module, designed to addwireless Bluetooth music playback capability to wired audio devices. It supports bothUSB 5V and 3.7V lithium battery power supply, outputs stereo audio, and is widelyused for speaker modification, amplifier upgrade and DIY audio projects.• Supply voltage: 3.7V ~ 5V DC• Audio output: Stereo analog output• No programming required, plug and play2. Interface & Pin DefinitionInterface / Pin FunctionMicro USB 5V DC power input3.5mm Jack Stereo audio output forheadphones / speakers /amplifierBAT 3.7V lithium battery powerinput padR Right channel audio outputpadG (GND) Audio common ground padL Left channel audio outputpadLED Indicator Blinks in pairing mode;stays solid when connected3. Operating GuidePower Supply• Option 1: Connect 5V power supply to the Micro USB port.• Option 2: Connect a 3.7V lithium battery to the BATand GND pads.Audio Output• Option 1: Plug a 3.5mm audio cable into the jack to connect with your speakeror amplifier.• Option 2: Solder wires to R, G, L pads for direct internal connection.Bluetooth Pairing1. 2. 3. Power on the module, the indicator LED will flash.Enable Bluetooth on your phone / device, search and connect to the module.After successful connection, the LED stays on. You can play music wirelessly.4. Precautions• Do not apply voltage over 5V to avoid damaging the module.• Confirm correct positive and negative polarity before powering on.• Keep the module away from water, high temperature and strongelectromagnetic interference.• Soldering is required for pad-type connection.