Description: Good performance: This audio receiver is easy to connect to many other devices because it is designed with bluetooth-compatible V5.0 technology. Easy to use: This music for decoder adopts stereo sound track that provides you with better sound quality, giving you a good listening experience. Portable: This music for amplifier board module is easy to install and use, and it is easy to store and carry. Convenience: With audio receiver, you can power it with USB when playing music, making your use more convenient and easier. Power: When the audio receiver is powered by USB, the red light is flash and the power is regular, when it is powered by single power supply. Specification: Color: black. Size: show as pictures. Power: 3.7-5V. bluetooth-compatible version: 5.0. Connecting distance: about 15m. Decoding format: WAV+APE+FLAC+MP3, lossless decoding, stereo output. Note: There might be a few color distortions due to different computer resolutions. There might be a slight error due to different hand measurements. (if the USB input is disconnected when charging or discharging, the module will break for a few seconds) Package Includes: Type 1: 1 Piece Audio Receiver(with 1 Piece Case). Type 2: 1 Piece Audio Receiver.