SX6 Portable Wireless Microphone Dual mic With Charging Station Noise Reduction

Use: Computer Karaoke Cell Phone Conference Transmission Type: Wireless Type:Lavalier Frequency Range: 20-20KHZ Battery life:6 hours Mic:Digital mic Signal-to-noise ratio:64DBM adaptive noise reduction Battery capacity:70mAh Input votage:5V Transmission distance:Barrier-free 15 meters Charging compartment battery capacity:300mAh Sensitivity:-42DB Transmission delay:30MS