Amplifier Board, DROK TPA3116 HiFi Dual-channel Stereo Audio Amplifier Subwoofer DC10-25V Digital 2.0 Amp Module 25W+25W Output with Volume Adjustment Knob

Product Review

Features:
Three kinds of audio input: Bluetooth receive; USB decoding play; TF card decoding play.
Power: DC5V; Effective bluetooth transmission distance: 10-15 meters.
Support multiple formats: MP3, WMA, WAV, FLAC.
The front output can directly promote headphones or connect rear amplifier.

Key Operation:
MODE: press the "MODE" button to switch among three kinds of audio input, Bluetooth receive; USB decoding play; TF card decoding play.
NEXT: short press the "NEXT" button to play the next song, long press the "NEXT" button to increase volume.
BACK: short press the "BACK" button to play the previous song, long press the "Back" button to decrease volume.
EQ: sound effect manager(only valid under USB or TF card playing mode).
Audio Output: for connecting headphones, active loudspeaker box or amplifier(if yours is passive loudspeaker box, please connect amplifier first).

Connection:
1. First off it's a Micro USB connection for power, powered by DC 5V, or if you want to solder your own power then you can take that route if you like. Then connect headphones or active loudspeaker box or amplifier to the audio output.
2. Open the Bluetooth function of your cell phone or other devices with Bluetooth audio stream output support(such as laptops, tablet PCs, etc.), please first delete other bluetooth devices that had been connected to your phone before on your phone(or the bluetooth connection will be unstable), and then the phone will automatically search and pair with the module, no pairing codes or button mashing needed. After a successful connection, the phone will show that the module Xpecial audio has been connected, while the LED blinks blue.

Package Includes:
1 x Bluetooth Audio Receiver Board

this bluetooth audio receiver board is able to give your amplifier/home stereo bluetooth capability, just a very simple operation can be converted into wireless audio, you won't need to be tethered by a cord when you y play music through the aux input on the home stereo, from cord to say good-bye
power: it's a micro usb connection for power, powered by dc 5v, or if you want to solder your own power then you can take that route if you like the audio output connects to headphones or active loudspeaker box or amplifier(if yours is passive loudspeaker box, please connect amplifier first) then your own wireless audio is done
super easy to connect the bluetooth: open the bluetooth function of your cell phone or other devices with bluetooth audio stream output support(such as laptops, tablet pcs, etc ), and then the phone will automatically search and pair with the module, no pairing codes or button mashing needed; effective transmission distance: 10-15 meters
"it has three kinds of audio input: 1 bluetooth receive; 2 usb decoding play; 3 tf card decoding play, press the "mode" key to switch between them; support multiple formats: mp3, wma, wav, flac; when you hook it up and turn your bluetooth on and add your device then no one else can connect to it too so your building a bluetooth homemade speaker box it's perfect, just enjoy your own diy wireless amplifier it"
the bluetooth audio transmitter board has small membrane buttons for mode, volume(volume can be controlled from the phone or buttons on the board), next, previous, play/stop and sound effect(only valid under usb or tf card mode), please refer to the pictures shown on listing also has a small led blinks blue when the bluetooth connects successfully

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DROK Portable Wire~Less Blue~Tooth Audio Receiver Board, Support TF Card USB Decording Play, Blue~Tooth Stereo Music Transmitter Module for Headphones HiFi Amplifier, Black

Product Review