Tags: Bluetooth decoding board MP3, Bluetooth 4.1, amplifier modification, circuit board, XY-BT Mini, PCB installation Set Bluetooth connection password to prevent others from accidentally connecting; Ultra small size, easy to embed and decorate products; Two channel stereo output, compatible with most power amplifiers, home audio, car audio and other devices on the market; The standard MICRO MINI USB 5P interface, equivalent to an Android phone charging port, can be powered through a phone data cable; Specific DIY embedded modification pins that can be inserted into one's own circuit board for soldering modifications; High fidelity output circuit, resistor capacitor isolation, no noise, good sound quality; Wireless USB flash drive, storage card and button settings, pure mobile phone operation to play MP3 connection;