Equipped with a mini 450 mA rechargeable box, charging box can be used as a storage box, the headset is not easy to lose, go with the release. Outdoor charging more convenient. Simple one-button operation, convenient and quick. 10 meters transmission distance, the link does not get stuck. This is a truly wireless Bluetooth headset, which through the transmission chip series, the realization of two mono headphones vocal fusion conversion, to be able to enjoy a more free, shocking stereoAdjustable for Running, Cycling, Gym, Travelling and More. IPX4 anti-perspiration, sweat and waterproof to prevent components damage and to ensure headphone safety. ompact, wear more comfortable. (Black) Bluetooth Headphones Compact Wireless Hearphones Mini Bluetooth Wireless Dual Earbuds with Mic Description Function: Sport,For Mobile Phone,Common Headphone Line Length: None Is wireless: Yes Waterproof: No Support Apt-x: No Support Memory Card: No Connectors: USB Resistance: 32? Plug Type: Wireless Active Noise-Cancellation: No With Microphone: Yes Style: Ear Hook Sensitivity: 123dB Frequency Response Range: 20-20000Hz Brand Name: M.sman Vocalism Principle: Dynamic Support APP: No Communication: Wireless Control Button: No Model Number: TWS ES60 Wireless Type: Bluetooth Volume Control: No