2x Wireless Handheld Microphone System for Home Karaoke, Meetings, Parties, Speech Ear: 12x8 cm/4.7x3 inches - Inner mesh panties Mute control: lock sound Frequency deviation: 11 kHz Frequency response: 80 Hz-15 kHz Frequency stability: 0,005 percent Signal-to-Noise Ratio: andgt 60dB Distortion: 0,5 percent (1 kHz) Number of Channels: Two Channels Sensitivity:-70dB M. Use distance: 50 meters in open space Receiver power supply: DC 12V/320mA Transmitter Power Supply:battery AA Transmission power: 20 mW Frequency range: 200 MHz-270 MHz Output mode:independent and mixed automatic launcher selection: Frequency stability: 0,005 percent Carrier output power:30 mW Distributed radiation attenuation:andgt 40dB Modulation method: vhf Maximum degree of modulation: 75 KHz Reception method: (capacitive) (LWM-6188 /C) Recipient: Reception Sensitivity: 40dB Audio Output Impedance:600 Ω Audio output level: 0-0,5 V. Power supply: AC220-240V 50 / 60Hz Power consumption: 1 W. The package includes: 2 pieces microphones 1 piece receiver 1 piece converter 6,3 mm to 3,5 mm 1 piece manual