Welcome to the store! For DSP audio processing chip, full of sound quality. Let you enjoy the KTV effect at home. U-segment high-frequency transmitter chip, 30m/98.4ft ultra-long distance. Support for optical fiber high-definition digital audio signal decoding. Rich interface, compatible with all input devices, new HDMI for ARC audio return function. USB sound card digital audio function, support for a part of the APP recording scoring function. The microphone system is easy to use with multiple systems and is perfect for any professional or recreational activities. Bluetooth 5.0 wireless audio transmission with high speed and low loss. 3.5 audio input port is reserved to ensure traditional audio input. Item Type: Karaoke Machine Color: As Pictures Shown Weight: 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: 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 Moving Coil Directivity: Cardioid Battery: 2 x AA Battery (Not Included) Frequency Range: 700MHz-780MHz Frequency Response: 20Hz-17.5KHz Receiver Sensitivity: 99dBm-82dB Audio Dynamic Range: ≥100dB Transmission Power: ≥100Bm Total Harmonic Distortion: >0.3% U-segment Transmission Range: 30m/98.4ft 1 x Karaoke 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 RCA Cable 1 x AC Plug 1 x Manual Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will give you the best solution!