Wireless Microphone Karaoke Mixer System Supports HD Multimedia Interface Optical AUX Outputs for TV Computer Speaker Amplifier 100‑240V US Plug 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: <200mA General Parameters: Output Mode: HD Multimedia Interface, 3.5mm Sound, Optical Spdif Bluetooth Version: V5.0, Compatible with Bluetooth V4.2 and V2.1+EDR Sound Sampling Rate: 48KHz