Personalize them in bulk to save moreThe Solekick™ Quick Charge True Wireless Earbuds features include Bluetooth® 5.0, Auto Pairing, and Auto Power-On. Once the earbuds are removed from the case, the earbuds power on and automatically sync to each other! The case also doubles as a power bank for your earbuds and can be charged with the included USB-A-to-Type-C cable. It only takes the case 30 minutes to charge the earbuds from 0% to 100%. The playback time of the earbuds is around 5 hours. Once the 400mAh battery of the case is charged, it will charge the earbuds 4x from 0-100%. The ergonomic design of the earbuds and silicone tips keeps them in place on the go. The earbuds have built-in music controls and dual microphones for hands-free operation. Simply press the music control button to turn on transparency mode. Once transparency mode is turned on, you will hear surrounding sounds without removing the earbuds. The case can be charged in under 1.5hrs.