The super-compact design of these True Wireless Stereo Bluetooth Earbuds makes them easy to slip in your pocket. The earbuds have a comfortable universal-fit design, making them most suitable for everyday use, and not necessarily for rigorous sporting activity. Great for listening to music on the go, and the built-in microphone allows you to use them for phone calls too. Pair the earbuds once with your device (phone, tablet or laptop), and you wont need to do so again they will automatically pair thereafter, as soon as you remove the earbuds from the case, providing your device has Bluetooth mode switched on. case: 4.5 ( l ) x 4.5 ( w ) x 2 ( h ) cm ABS charging cable and user manual are included Bluetooth V5.3 built-in microphone supports call pick-up case battery: 180mAh earbud battery: 28mAh playback time: 3 3.5 hours LED power indicator packaged in a Swiss Cougar gift box