Nov 28, 2017
Battery power supply: 3.7V rechargeable lithium ion battery Headset Weight (with battery): 18 oz. Headphone Transducer: 40mm moving coil
Lightspeed Tango Wireless! Premium headset with outstanding noise cancelation, renowned Lightspeed comfort and no cables to get in the way of your flight.
Check them out at: http://www.aviationheadsets.us/product/lightspeed-tango-wireless-aviation-headset/