Description 1. Bluetooth Version: 5.0 EDR 2. Play Mode: Bluetooth/Micro-SD Card/3.5mm AUX 3. Drive Units: φ52mm, 4Ω 4, Power: RMS 5W 5,Battery Capacity: 2,200mAH/3.7V 6, Play Time: 12H 7. Charging Time: About 3H 8. Power Indicator: Yes