2.4G private transmission protocol, private high-quality compression algorithm Adaptive frequency hopping, strong anti-interference/stable signal/long distance Automatic pairing, plug and play Extremely low delay, delay Less than 20ms, audio and video synchronization Good compatibility, supports mobile phones/computers/tablets at the same time. Overall power consumption: transmitter Less than 15mA, receiver Less than 30mA Supports slow charging or fast charging of mobile phones (charging while recording) Built-in 360-degree omnidirectional high-definition high-sensitivity microphone Frequency response: 20HZ-20KHZ Sensitivity: -38dB Signal-to-noise ratio: -65dB Transmission distance: 20 meters Material: plastic+metal colour: black Package Contents: 2 x Microphone 1 x Type-c interface 1 x English Manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.