Feature: 1. Superior Performance: 2.4G private transport protocol, private high quality compression algorithm. Adaptive frequency hopping, strong anti interference, signal stability, long distance. 2. Simple Operation and Charging Ways: Automatic pairing, plug and play, supporting slow or fast charging (charging while recording). 3. Clear Sound Quality: High density sponge filter noise, clear pickup improves sound fidelity, high density sponge head (anti spray and anti wind). 4. High Sensitivity: The wireless lavalier mic built in 360 degree full pointing high sensitivity microphone, but also support ECM, MEMS, analog microphone. 5. Compatible and Long Service Life: Good compatibility, while supporting mobile phone, computer, tablet. The microphone has a built in 60mAh rechargeable button battery that can last 6 to 10 hours. Specification: Item Type: Wireless Lavalier Microphone Material: ABS Emitter ＜10mA Receiver ＜25mA Support: USB Firmware Backup and Upgrade Built In Lithium Polymer Battery: 60mAh Frequency Response: 20HZ-20KHZ Sensitivity: -30db Snr: -65db Transmission Distance: 20m/65.6ft Interface: Type C . Package List: 1 x Receiver 1 x Transmitter1 x Description1 x Charging Line 1 x Hang Rope