# Multi-Function Design: Elegant Design for USB Car charger and Bluetooth Stereo Earphone two in one. # Intelligent Multipoint Connection:The Bluetooth earphone support connect two bluetooth device in the same time and have clear Call quality. # Driving Safety and Healthy: Picking up the earphone to use/answer call at any time without wearing the earphone all the time. # Fast and Intelligent Charging:Charging dock comes with 2.1A Fast Charging USB port. Keep you phone charged while charging your headset. # No Need Driver: USB2.0 port support plug and play, no need any driver. # Bluetooth version: 4.1 # Standby time: About 50hours # Talking time: About 3hours # Music time: About 2.5 hours # Charging time: About 2hours # Battery capacity: 35mAh # Frequency: 2.402G-2.480G