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 New Item Type: Karaoke Machine Color: As Pictures Shown Weight: Approx. 855g/30.2ozModel: 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: 20Hz〜18khz Distortion: < 0.5% Power Supply Voltage Range: (2.0V~ 3.6V) Operating Current: <60 Ma Distortion: < 0.5%. Microphone Material: Aluminum Alloy + Plastic Core: HiFi with Moving Coil Directivity: Cardioid Battery: 2 x AA Battery (Not including) Frequency Range: 700MHz-780MHz Frequency Response: 20Hz-17.5KHz Reception Sensitivity: 99dBm-82dB Audio Dynamic Range: ≥100dB Transmitting Power: ≥100Bm Total 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 Cable 1 x 3.5mm to for RCA Cable 1 x AC Plug1 x Manual Note: Installation Precautions: ‑ The sound of K8 microphone needs to be produced through an external sound system. The built‑in 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 set‑top box users: The external stereo system can be used as the speaker to play songs on your set‑top 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 set‑top 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.