Feature:1. For DSP audio processing chip, full of sound quality. Allow you to enjoy the KTV effect at home.2. U segment high frequency transmitting chip, 30m/98.4ft ultra long distance. Support optical fiber high definition digital audio signal decoding.3. Rich interface, compatible with all input devices, new HDMI for ARC audio return function.4. USB sound card digital audio function, support part of the APP recording scoring function.5. The microphone system is easy to use with multiple systems and is perfect for any professional or recreational activity.6. Bluetooth 5.0 wireless audio transmission with high rate and low loss. 3.5 audio input port is reserved to make sure traditional audio input.Specification:Condition: 100% Brand NewItem Type: Karaoke MachineColor: As Pictures Shown Weight: Approx. 855g/30.2ozModel: K8Chip: for DSP8048ABluetooth Protocol : 5.0Ports: Bluetooth 5.0, Fiber Input, USB Sound Card, 3.5 Audio Input, HDMI (for ARC) InputSensitivity: 108dbm@ 12dB SINADAudio Dynamic Range: 106dbFrequency Response: 20Hz18khzDistortion: < 0.5%Power Supply Voltage Range: (2.0V~ 3.6V)Operating Current: <60 MaDistortion: < 0.5%.Microphone Material: Aluminum Alloy + PlasticCore: HiFi with Moving CoilDirectivity: CardioidBattery: 2 x AA Battery (Not including)Frequency Range: 700MHz-780MHzFrequency Response: 20Hz-17.5KHzReception Sensitivity: 99dBm-82dBAudio Dynamic Range: 100dBTransmitting Power: 100BmTotal Harmonic Distortion: >0.3%U Segment Transmitting Range: 30m/98.4ft.Package List:1 x Karaoke Machine2 x Wireless Microphone (1.5V AA battery not included)1 x 3.5mm audio cable 1 x USB A/A Cable1 x 3.5mm to for RCA Cable 1 x AC Plug1 x ManualNote: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.