Wired Bluetooth Earbuds with a built-in microphone, great for work, play or exercise. Packaged in a protective, round EVA case. Case: 3 ( h ) x 8 ( dia) cm EVA Earbuds: 60 ( l ) cm ABS amp; TPE supports playback and call pick-up from smartphones, tablets, and most other Bluetooth compatible audio devices internal rechargeable lithium-polymer battery recharges via USB cable ( included ) Bluetooth version 5.0 10m visible distance 2 hrs recharge time 3 hrs playback time