Features: Adopt digital output and analogues output, can use TypeC mobile phone etc, 3.5 interfaces multiple functions Bluetoothcompatible supports quick connection with various devices and easy operation. Noise reductions, double way monitorings, input, Wirelessly pairing, powers on automatic connection, simple operation, support one to double use; The wirelessly lavalier mic wind design is easy to wear comfortably for long periods of time and is not limited by cable. Can be used for mobile phones, computer, tablets, speaker, amplifiers, cameras and other devices. Specifications: Microphone: Digital Input voltage: 5V Microphone battery: 200MAH Receiver battery: 200MAH Cockpitbattery: 1000MAH Endurances: 9hours Signal-to-noise ratio: 64DBM Transmission Delay: 30MS Sensitivity: -42DB Frequency range: 20-20KHZ Transmission Distance: 20m-30m for barrierfree Package Includes: 1Set Wirelessly Microphone note: Due to the problemsof lighting effect and shooting, there mightbe certain tolerances in product, please understand. Please allow 0-1cm error due to the measurment.