Description: 5.1 RECEIVER TRANSMITTER: Adopt 5.1 chip design, receiver (RX) and transmitter (TX). Universal audio interface design, plug and play, strong compatibility with various audio playback devices such as speakers, desktop computers, HD TVs, notebooks, old style TVs, game consoles, projectors, power amplifiers, headsets, mixers etc. LED DISPLAY AND DSP TECHNOLOGY: Equipped with LED digital display screen, the working status and mode are clearly visible; built in DSP decoding chip, heavy bass effect, the device supports treble and bass button adjustment. NFC CONNECTIVITY : With NFC functionality, you can easily connect your smartphone by 1 touch; the indicator light is soft and not dazzling, and the brightness of the light changes according to the volume level. RECHARGEABLE: listening to music for about 8 hours, battery life up to 30 days Support U disk TF card playback, support MP3 WMA SBC WAV DTS A52 FLAC AAC AIF AMR APE format. Support 5~8 meters remote control. SUPPORT MICROPHONE : Support microphone access for singing, anti howling design. Connection is simple, without any driver and APP download Specification: Support protocol: A2DP AVRCP HSP OPP GATT SM Working frequency band: 2.402GHz -2.480GHz Sensitivity: -85dBm