* Built-in Bluetooth receiver* Rechargeable lithium-ion battery charges in less than 2 hours; 500mAH/ 1.85Wh (built-in)* Up to 20 hours of listening per charge when listening at 50% volume* Pair twin speakers for stereo sound with TWS mode (second speaker sold separately)* USB-C charging cable included* Optional carry strap* Hands-free calling* Imported