Specifications: Name:One for two wireless VHF microphone; Frequency deviation:±11kHz; Frequency response:80Hz-15kHz; Frequency stability:±0.005%; Signal to noise ratio:>60dB; Distortion:0.5% (1kHz); Number of channels:two channels; Sensitivity:-70dB M; Use distance:50 meters in an open area; Receiver power supply:DC 12V/320mA; Transmitter power supply:AA battery (not included in the package); Transmitting power:20mW; Frequency range:200MHz-270MHz; Output mode:independent and mixed automatic selection; Launcher: Frequency stability:±0.005%; Carrier output power:≤30mW; Stray radiation suppression:>40dB; Modulation method:VHF; Maximum modulation degree:±75KHz; Pickup method:(capacitive) (LWM-6188/C); Receiver: Receiving sensitivity:40dB; Audio output impedance:600Ω; Audio output level:0-0.5V; Power supply:AC220-240V 50/60Hz; Power consumption:1W; Package Included: 2 x Microphones; 1 x Receiver; 1 x Charging Cable; 1 x Audio Line