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 0 wireless audio transmission with high rate and low loss. 5 audio input port is reserved to make sure traditional audio input. 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 Manual Condition: 100% Brand New Item 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: 20Hz〜18khzDistortion: < 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