Microphone Wireless Transmitter Receiver System

Working hours 4-5 hours power supply Built-in lithium battery Delay Less than 3ms Signal-to-Noise Ratio 110dB Frequency response rate 20Hz-20KHz[3dB) Sensitivity -88dB Limited frequency range 550.25-573.75MHz Channels 2*10 Working distance 90 feet (30 meters) Input voltage DC5V