Feature: 1. Wireless: The lavalier microphone is wirelessly, completely free from the shackles of wired, very convenient to use 2. Clip Design: The mini recording microphone is designed with clip, which can be clipped anywhere on the clothes 3. Small and Light: The live stream lavalier microphone is small and light, no feeling when clip on the clothes, and is easy to store, does not take up space 4. Strong Noise Reduction Ability: The mini lavalier microphone has built in noise reduction algorithm, features strong anti interference ability, can effectively identify the original sound, and record clearly in a noisy environment 5. Simple Operation: The wireless microphone is plug and play, no need for cumbersome operations, can be automatically connected when plug with transmitter after turning on Specification: Item Type: Wireless Lavalier Microphone Material: Metal and plastic Colour: Black Frequency Response Range: 20-30KHz Transmission Delay: 9Ms Signal to Noise Ratio: 64db Input Voltage: DC4.8-5.4V Charging Current: About 65mA Battery Capacity: 80mAh Working Time: About 20h Charging Time: About 80min Built in Battery: 1 x Button battery in Receiver, 1 x Button battery in Transmitter. Package List: 1 x Wireless Lavalier Microphone2 x Transmitter1 x Manual1 x Charging Cable