Feature: 1. [Anti Interference] Wireless microphone adaptive frequency hopping, strong anti interference and long distance. 2. [Stable] Automatic pairing of the USB C wireless lavalier mic, plug and play, analog microphone, signal stability. 3. [High Sensitivity] Built in 360 degree omnidirectional HD high sensitivity microphone, but also supports ECM, MEMS. 4. [Compatible With] Mini wireless lapel microphone compatibility, while supporting cell phones, computers, tablets. 5. [Long Life] Wireless clip on microphone built in 60mAh rechargeable coin cell battery, can last 6‑10 hours, long service life. Specification: Item Type: Mini Wireless Lavalier Microphone Material: ABS Model: K8 Frequency Range: Bluetooth Frequency Response: 20-200KHZ Microphone Built In Lithium Battery Capacity: 60mAh Transmission Distance: 20m/65.6ft Transmission Delay: 30MS Sensitivity: -42dB Microphone: Silicon Microphone SNR: 64dBm Use Time: About 4 Hours. Package List: 1 x Receiver1 x Transmitter1 x Instruction Manual1 x Charging Cable