2.4G Wireless Lavalier Microphone System Dual Microphone Built-in Noise Reduction Chip Plug and Play Professional Collar Clip Microphone for Video Recording Phones Computers Laptops Cameras Pointing Type: Omnidirectional Rated Input: DC 5V=200MA Frequency Range: 2.4G Standard Charging Time: About 2 hours Frequency Response Range: 50HZ-18KHZ Working Hours: About 6-8 hours Transmission Distance: About 15-25m Standby Battery Life: About 10 hours Signal to Noise Ratio: >64DB Transmission Delay: 30MS Sensitivity: -42dB Working Temperature: -10 ° C-45 ° C Storage Temperature: -20 ° C-60 ° C Charging Interface: Type-C charging interface Microphone/Receiver Battery Capacity: 200mAh/3.7V Product Style: 1 Receiver with 1 Microphone, 1 Receiver with 2 Microphones (optional) Microphone Size: 43 * 47 * 10.6mm/1.7 * 1.8 * 0.4inch Receiver Size: 45 * 60 * 12mm/1.8 * 2.4 * 0.5inch