Microphone UHF Headset & Handheld 2 in 1 Mic 2.4G Headworn Microphones Wireless

Operating instructions: Key description: Long press the power button to turn on/off the hine. VOL+VOL - Short press to increase step by step, and long press to continuously increase to the maximum volume, up to 8 levels Code description: When starting TX / RX, first press the transmitter power button 3 times and then press the receiver power button 3 times. If the connection is successful, there is a sound and the LED light is on Noise reduction instructions: Short press the power button to turn on the noise reduction light, which remains on. If the noise reduction light is not turned on, it flashes every 2 seconds Product parameters: 1) Working voltage: 3.7V/100mA 2) Working current: 10mA+/-5mA 3) Standby current: 5uA 4) Charging current: 60mA 5) Full of approximately 1.5H 6) Approximately 8H of battery life 7) Launch distance: 15m 8) Mic sensitivity: 38dB+-2