Thank you for viewing. This is an unopened product. If you are interested, please feel free to comment. Open-ear bone conduction earphones with up to 20 hours of playback. - Model Name: RunFree Lite2 - Type: Open-ear earphones - Bluetooth Version: V5.0 - Playback Time: Up to approximately 20 hours - Charging Time: Approximately 2 hours - Battery Capacity: 150mAh