Cordless Microphone (PAIR)

https://www.bietrun.com/%E5%89%AF%E6%9C%AC-wireless-bluetooth-microphone-ma
	
	
Frequency band: U band.
	
	
	
Number of channels: 15 Set channels.
	
	
	
Receiver battery capacity: 650 mAh polymer battery.
	
	
	
Receiver working hours: 4 hours.
	
	
	
Connection distance: 160 feet (in classroom).
	
	
	
Receive sensitivity: 130dB.
	
	
	
Microphone power: AA battery.
	
	
	
Housing material: aviation aluminum alloy.
	
	
	
How to use: Plug and Play.
	
	
	
Volume adjustment: 5 levels.