Brand N/A Quantity 1 Color Black Material ABS Impedance 500ohm Microphone Frequency Response 220~250MHz Sensitivity >10dBV Interface Type Wired Working Voltage 110 / 220 V Features Frequency stability: >90dB; Dynamic range: >0.5%; Harmonic response: 40Hz~15kHz; Audio output: 0~400mV; Maximum using operation distance: >=200m; Receiver SNR: >90dB; Spurious Emission: >80dB; Channel interference ratio: >80dB; Receive sensitivity: >10dBuV; Deemphasis: 50us; Transmitter power: 8.5mW; Modulation: FM / F3F; Frequency maximum deviation: +/-25kHz; High harmonic: >40dB; Continuous using time: 6~8 hours Others Every microphone is powered by 2 x AA batteries (not included); Unique squelch function; Straight distance 50m broken line distance 30m; Fidelity sound stable frequency anti-interference. Packing List 1 x Home KTV device 2 X Wireless microphones 1 x 6.35mm male to male cable (1m) 1 x 2-flat-pin plug power charger (220V / 140cm)