As a type of small Bluetooth audio receiver, BT-01 adopts Bluetooth 4.2 technology to receive audio signal from a Bluetooth device, and supports external USB playback function of various audio formats, fast starting Bluetooth or USB playback functiononly by inserting mixer or active speaker without requiring any special driver. Besides, this receiver is built in with chargeable lithium battery. Features: Connect Bluetooth device fast; XLR male is connected easily for signal input from external mixer or active speaker; Bluetooth receiving distance up to 7-10m; L/R audio mix output (XLR male); Support USB playback, maximum 32 G U-disk; Supports playbck of MP3, WMA, WAV, APE, FLAC and other audio formats; Applications: Background music, lecture, rehearsal; Frequency response: 20 Hz – 20 kHz; THD+ Noise: <0,01%@ 1 KHz, 0,7V; Bluetooth version: 4.2; Maximum output level: 0 dB; S/N ration: 95 dB (A-weighted); DAC: 24 bit 44.1 kHz; Bluetooth transmitting distance: 7-10 m; MP3 formats: MP3/WAV/VMA/APE/FLAC; Power requirements: Internal 800 mAH lithium; Working temperature: 3-4 h; Charging: MICRO USB