[BLUETOOTH]: No more cables! Be freely movable on all your journeys and easily connect your headphones to your phone via the Bluetooth 5.1 connection. Audio output syncs in real time, no matter how far away you are from your device, so you can enjoy your music or games instantly. [Charging Time]: Enjoy precise, high-class sound and up to 5 hours of listening pleasure on a single charge. The included charging case gives you another 20 hours charging time (total 25 hours). Charging time: 2 hours [KEY LINKS]: Convenient for effortless control of audio playback, calls - there are shortcut keys on each earpiece. Waterproof: thanks to the IPX4 rating, you can still listen to all your favourite music even in the rain. They are also sweat resistant. [Practical]: These earphones have been carefully shaped to fit your ear during sports activities so they fit securely