The Synergy True Wireless Auto Pair Earbuds with ENC feature the latest technology in audio. Once the case is opened, the earbuds will power on and automatically sync to one another. The case also doubles as a power bank for the earbuds and can be charged with the included Type-C cable. Once the 400mAh battery of the case is charged, it will charge the earbuds 4x from 0-100%. With over 4.5 hours of playback time at max volume on a single charge, they’re a must for any traveller or gamer.