Adults Handsfree Call Bluetooth-compatible Earphone Working Driving Meeting Running Rechargeable Headset Headphone Comfortable: This wireless earphone delivers a good touch feeling and is suitable for all kinds of people. Suitable occasions: This bluetooth-compatible headphone is a nice choice to wear during sports, fitness, traveling, hiking, working, and so on. Good performance: This wireless headphone is designed with a large speaker that can deliver clear and loud sound. Hand-free call: This wireless earphone is designed with a noise cancelling microphone, so it can deliver clear call. Long use time: This wireless earphone comes with a charging case that can display power level and also can dramatically improve the work time. Specification: Size(LxWxH): Earphone: Approx. 38x55x16mm/1.49x2.17x0.63 inch, charging case: Approx. 97x58x31mm/3.82x2.28x1.22 inch. Bluetooth-compatible version: 5.1. Support protocol: HFP,HSP,A2DP,AVRCP. Range: Approx. 10m/32.81ft. Call time: About 12h. Music play time: About 15h. Standby time: 300h. Battery: Polymer li-battery. Voltage: 3.7V. Battery capacity: Earphone: 70mAh(Built-in), charging box: 600mAh(Built-in). Charging time: Earphone: 1h. Speaker: 16mm. Impedance: 16. Frequency: 20-20KHZ. Waterproof: IPX5. Earphone color: Black, white, orange, green. Charging box color: Black. Note: There might be a bit of color distortions due to different computer resolutions. There might be a slight error due to different hand measurements. Package Includes: 1 Piece Earphone(with 1 Piece Charging Box, 1 Piece User Manual).