Feature:1. USES: Output mixed sound signals via HD Multimedia Interface, 3.5mm Aux, SPDIF sound output to smart televisions, home theater system or other sound systems, suitable for home karaoke, DJ music, house parties, schools and churches.2. WIRELESS MICROPHONE SYSTEM: The karaoke mixer includes 2 handheld wireless microphones. Each wireless microphone has individual volume control. Easy to use, plug and play.3. 25 METER WIRELESS OPERATING RANGE: The wireless microphone karaoke set has a UHF wireless use range of up to 25 meters, and each UHF microphone has several adjustable frequencies for better anti interference.4. ADJUSTABLE: The receiver has 5 rotatable knobs to quickly adjust the volume of the music, microphone, reverb, and sound to the level you want, and you can set different parameters by yourself to reflect your specific style and output the best real sound that is clear and robust.5. WIDELY COMPATIBLE: Wireless microphone karaoke mixer system is compatible with TV, desktop computers, laptops, for IOS tablets, tablets, smartphones, PA systems, DVD players, home theater systems, receivers, speakers, amplifiers and more.Specification:Item Type: Wireless Microphone Karaoke Mixer SystemMaterial: Aluminium AlloyWireless Microphone System Parameters:Frequency Range: 620-688MHz, UHFsound Frequency Response: 50HZ-15KHZ3dBDynamic Range: >95dBS N: 90dBOperating Range: >Approx. 25m/82.0ftTransmitter Parameters:Frequency Stability: 0.02RF Carrier Power: 10mWModulation System: for PLL SynthesizerModulation Mode: FMAntenna: 1/4 Herical AntennaSelectable Channels: 10x2 FrequenciesMaximum Deviation: 75KHzBatteries for Single Microphone: AA x 2 (Not Included)Current Consumption: 120mAReceiver Parameters:Frequency Range: 620-688MHz, UHFFrequency Stability: 0.002 Modulation System: for PLL SynthesizerSquelch Sensitivity: 6dB(-101dBm)Spurious Response Rejection: >90dBT.H.D: 0.01%AF Output Level: 0-2VCurrent Consumption: <200mAGeneral Parameters:Input Mode: Bluetooth, HD Multimedia Interface, 3.5mm Sound, Wireless MicrophoneOutput Mode: HD Multimedia Interface, 3.5mm Sound, Optical SpdifHD Multimedia Interface Output Input: Support HD Multimedia Interface 1.4, Resolution up to 4K30HzBluetooth Version: V5.0, Compatible with Bluetooth V4.2 and V2.1+EDRSound Sampling Rate: 48KHz.Package List:1 x Karaoke Mixer2 x Microphone1 x Power Adapter1 x Power Cord1 x Instruction ManualNote:Microphones are shipped without batteries.