... 3.7v 3.Battery Capacity: about 40mAh Bluetooth Headset :Multipoint Mono and Stereo Bluetooth headset with Noise Cancellation and display battery power ... 85hTalking time:about 3hMusic time:about 2.5hOur major products:Headphones, speakers, radios, multifunctional items, toys, outdoor sports equipment, home ... forward to establish long term business relationships with you . Mini Bluetooth Headset