1For DSP audio processing chip, full of sound quality. Allow you to enjoy the KTV effect at home. 2U segment high frequency transmitting chip, 30m/98.4ft ultra long distance. Support optical fiber high definition digital audio signal decoding. 3Rich interface, compatible with all input devices, new HDMI for ARC audio return function. 4USB sound card digital audio function, support part of the APP recording scoring function. 5The microphone system is easy to use with multiple systems and is perfect for any professional or recreational activity. 6Bluetooth 5.0 wireless audio transmission with high rate and low loss. 3.5 audio input port is reserved to make sure traditional audio input. Condition: 100% Brand New Item Type: Karaoke Machine Color: As Pictures ShownWeight: Approx. 855g/30.2oz Model: K8 Chip: for DSP8048A Bluetooth Protocol : 5.0 Ports: Bluetooth 5.0, Fiber Input, USB Sound Card, 3.5 Audio Input, HDMI (for ARC) Input Sensitivity: 108dbm@ 12dB SINAD Audio Dynamic Range: 106db Frequency Response:20Hz18khz Distortion: 0.3% U Segment Transmitting Range: 30m/98.4ft 1 xKaraoke Machine 2 x Wireless Microphone(1.5V AA battery not included) 1 x 3.5mm audio cable 1 x USB A/A Cable 1 x 3.5mm to for RCA Cable 1 x AC Plug 1 x Manual Installation Precautions: The sound of K8 microphone needs to be produced through an external sound system. The builtin speaker of the TV does not support sound output. The user needs to equip a set of external sound system. Check whether the external stereo works properly before installation. 1. Check method for settop box users: The external stereo system can be used as the speaker to play songs on your settop box normally. 2. Inspection method for TV users: Make the sound of TV through external stereo. 3. Bad contact of the connecting wire will cause noise and silence. Please slowly adjust the connecting wire joints on the K8 main machine. Select HDMI audio input mode, which requires the output device to support for ARC return function (for ARC function is usually marked on the interface of the device). Product connection mode:Smart television/smart settop box/computer PC/ smartphone and other devices can use (wireless Bluetooth /USB sound card /HDMI audio input/optical fiber input/audio input) to choose the corresponding audio cable connection, and then use the 3.5mm audio cable (K8 3.5mm output port) to connect the external audio system.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.