Specification: Item Type: Wireless Lavalier Microphone_x000D_Material: ABS_x000D_Emitter 10mA_x000D_Receiver 25mA_x000D_Support: USB Firmware Backup and Upgrade_x000D_Built In Lithium Polymer Battery: 60mAh_x000D_Frequency Response: 20HZ-20KHZ_x000D_Sensitivity: -30db_x000D_Snr: -65db_x000D_Transmission Distance: 20m/65.6ft_x000D_Interface: Type C Features: 1Superior Performance: 2.4G private transport protocol, private high quality compression algorithm. Adaptive frequency hopping, strong anti interference, signal stability, long distance. 2Simple Operation and Charging Ways: Automatic pairing, plug and play, supporting slow or fast charging (charging while recording). 3Clear Sound Quality: High density sponge filter noise, clear pickup improves sound fidelity, high density sponge head (anti spray and anti wind). 4High Sensitivity: The wireless lavalier mic built in 360 degree full pointing high sensitivity microphone, but also support ECM, MEMS, analog microphone. 5Compatible 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. PackageList: 1 x Receiver 1 x Transmitter 1 x Description 1 x Charging Line 1 x Hang Rope