Features:_x000D_ _x000D_ Supports 4 Audio input mode: Bluetooth receiver, USB decoding play, TF card decoding play and FM radio. _x000D_ Supports play format: MP3, WMA, WAV, FLAC. _x000D_ External power supply interface for lithium battery powered use. _x000D_ Preamp output can directly promote the headset, also can be connected to the use of rear stage power amplifier. _x000D_ Portable and compact size, light weight, easy to use and carry with you. _x000D_ _x000D_ Specification:_x000D_ Condition: 100% Brand New_x000D_ Material: Metal + Plastic_x000D_ Type: (optional)_x000D_ #1: Bluetooth Audio Receiver Board + Remote Control_x000D_ #2: Bluetooth Audio Receiver Board_x000D_ Power Supply: 5V DC_x000D_ Audio Output: 3.5mm Audio Output_x000D_ Product Size: _x000D_ Bluetooth Audio Receiver Board: Approx. 4 * 5cm / 1.6 * 2.0inch_x000D_ Remote Control: 8.6 * 4cm / 3.4 * 1.6inch_x000D_ Product Weight: Approx. 15g~28g_x000D_ _x000D_ Package Included:_x000D_ _x000D_ 1# Package Included: _x000D_ 1 * Bluetooth Audio Receiver Board (with microphone) + 1 * Remote Control _x000D_ 2# Package Included: _x000D_ 1 * Bluetooth Audio Receiver Board (without microphone) _x000D_ _x000D_ Note:_x000D_ 1. Remove the translucent white plastic sheet from the bottom of the remote control before using it, so as to power on in the right way._x000D_ 2. If you need the FM radio function, please first DIY a long wire as antenna on the FM antenna area.