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 System Material: Aluminium Alloy Wireless Microphone System Parameters: Frequency Range: 620-688MHz, UHF sound Frequency Response: 50HZ-15KHZ±3dB Dynamic Range: >95dB S N: ≥90dB Operating Range: >Approx. 25m/82.0ft Transmitter Parameters: Frequency Stability: ±0.02 RF Carrier Power: 10mW Modulation System: for PLL Synthesizer Modulation Mode: FM Antenna: 1/4λ Herical Antenna Selectable Channels: 10x2 Frequencies Maximum Deviation: ±75KHz Batteries for Single Microphone: AA x 2 (Not Included) Current Consumption: 120mA Receiver Parameters: Frequency Range: 620-688MHz, UHF Frequency Stability: ±0.002 Modulation System: for PLL Synthesizer Squelch Sensitivity: 6dBμ(-101dBm) Spurious Response Rejection: >90dB T.H.D: ＜0.01% AF Output Level: 0-2V Current Consumption: