1. Transmission distance: 10 meters 2. Bluetooth version: 4.2 3. Dual speakers, stereo, allowing you to experience powerful stereo sound 4. Built-in high-definition microphone, support hands-free call 5. Built-in large-capacity lithium battery, it can be used for about 4-7 hours when fully charged 6. Bluetooth, TF card, AUX three play modes, to meet the use of multiple occasions 7. Compatible with mobile phones/computers/tablets and other devices 8. Battery capacity: 1200mAh 9. Charging time: 2-4 hours 10. Size: 195x100x45mm