Automatic frequency pairing, instant use, 2.4G wireless technology, no wireless constraints, simple operation, automatic pairing when power on High-end condenser microphone, 360 ultra-clear radio, omnidirectional radio, equal amount of sound from all directions, clear restoration of human voice, and clear recording of sound details 40 meters long-distance transmission high-performance wireless technology, ultra-stable signal, audio and video synchronization Lavalier experience without feeling, compact and , sensitive to radio Clear recording of the original sound, pure original sound, delicate and true. Product parameters Frequency range: 45Hz-20KHz Pickup Pattern: Omnidirectional output level: and3dBu Maximum: SPL100dBSPL (1KHz 1m) Dynamic range: 102dBA (mic preamp) Power requirements: built-in lithium battery can be USB rechargeable Analog input: 3.5mmTES lavalier microphone input Analog output: 3.5mmTES (receiver) External microphone input: 20Hz-20KHz Dimensions: 42mm x 42mm x 15mm Material: ABS colour: black Package Contents: 2 x Transmitter 1 x Receiver 1 x windproof wool cover 1 x audio cable 1 x TRRS audio cable 1 x Charging cable 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.