Pick up 2 headsets from charging box They connect each other automatically then only easily enter mobile phone Bluetooth setting to pair the earbuds. Bluetooth 5.0 with technology on both bluetooth earbuds, provides faster pairing, stable connection and signal transmission (50ft no-obstacle range). Only need to take out two earbuds or any single earbud after you open Bluetooth function, they open and connect automatically. The program adopts a special software, single-, double- to play/pause music, which effectively reduce by mistakes or inaccurate . Besides, it could increase or decrease the volume and go back or forward the songs etc. More convenient when listening music and making calls. Compatible with various Bluetooth devices, including cellphones, tablets, laptops. 5-hour per charge and extends, you can charge the case via fast USB-C or wireless charger. Headphone battery: 50mAh Charging box battery: 500mAh Microphone sensitivity: 42db Drive sensitivity: 98db + -5db Earphone working time: more than 5 hours Standby time: 150 hours size:13 x 17 x 17.5MM Material:ABS colour:Skin Tone Package Contents: 2 x Mini Earphones 1 x Portable Charging Bin 1 x USB Cable Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.