Compatibility: For Computer, SLR Camera, Speaker, Sound Card.Suitable for small meetings, live broadcasts, speeches, blog recordings, video recordings etc.Intelligent noise reduction, clearer and more detailed human voice, built-in noise reduction chip, Turn on the intelligent noise reduction function by default upon startup.It Can Be During Use. Support mute mode and reverb mode. Noise reduction: default AI intelligent noise reduction Reverberation: supported, requires manual switching Mute: Supported, requires manual switching Transmission distance: obstacle free distance 15 meters; The distance between human obstacles is about 7 meters Transmission protocol: 2.4G channel Delay: 30ms. Directionality: -38dB 3dB omnidirectional silicon microphone. Frequency response: 20Hz-20KHz Sampling rate: 32KHZ or 48KHZ Signal to noise ratio: 64dB Microphone battery/usage time: 80MAH/6H Receiver battery/usage time: 120MAH/6H Working current at the transmitting end: 11-12mA Working current at the receiving end: 20-21mA The battery charging time is about 1.5 hours Charging input voltage DC5.0V Charging adapter: 5V/1A Working temperature -10 ~45 Colour: Grey Material: ABS Package Contents: 1 set x Wireless Lavalier Microphone 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.