"Premium earphones with unique touch function, excellent sound quality without distortion and built-in sensitive HD microphone. The earphones have a clear and precise sound, very pleasant in case of call and to listen to music. They are also designed to hide the noise outside, to be comfortable to wear and not to fall during a sports session for example. Small but elegant, you can bring them on you. The earphones fit almost every ear. They recharge in the case and are magnetic, no risk of them falling. Compatible with most Bluetooth devices. Technical characteristics : Bluetooth version: 5,0. Microphone sensitivity: -42DB. Operating voltage: 3,1V-4,2V. Charging voltage: 5V-500MA. Earphone battery capacity: 50mAh. Battery capacity of the case: 420 mAh. Case loading time: 1 / 2h. Earphone charging time: About 30/45 minutes."