Wireless Version 5.0 Communication Range: 10 meters (no obstacles) Charging time: About 2 hours Standby time: About 120 hours Music time: About 4 hours Type of battery: Lithium Polymer Battery Supporting Agreement: HEP/HSP/A2D/AVRCP Headphone Battery capacity: 3.7 V 50 mAh...

Noise Reduction Wireless Version: 5.0 Earphone Battery:  50 mAh Standby Time: 10 Hours Talking Time: 3 hours Charger Box Capacity: 2000mAh Wireless Protocol: HSP/HFP/A2DP/AVRCP