Wireless specification: Wireless V4.1 WT. Support protocols: Headset Hands-free A2DP Avrcp, thus earphone stream clear and continuous music and promise more stable signal, as well balanced sound, clear treble and powerful bass.
Charging voltage DC5V. Charging time: 2,5 hours.
Talk time is 15 hours, music time is 15 hours, standby time 340 hours, so you can enjoy music and calls freely anytime and anywhere without the bound of wire.
Battery capacity: 170mAh.
Also, earphone is compact and lightweight, size is only L61 × W16 × H21mm and weight is only 11g, therefore you can enjoy music freely anytime and anywhere without the bound of wire.
The battery level can be displayed on Apple and some Android devices, certainly you will know exactly how much battery is left when paired with your device.