TECHNIQUE SPEC.: Call time: 5 H at the longest Stay time: 120H Validity distance: 10M Size:121 x 150 x 30mm Weight: 88g Battery: polymer Compatibility: all bluetooth equipments that have ear function, no need picking up function. Main function: The first time bluetooth with headset stereo With the most advanced bluetooth CMOS chip To receive phone call easily when you enjoy music To support MOTO E680I stereo transmit Support PC and stereo transmit of some other equipment To support TV when we assort adaptor of bluetooth \ Acoustics and it's AV port, audio- equipment and stereo transmit