1. Wireless specification: V5.3 2. Wireless transmission range: 10m 3. Audio signal-to-noise ratio: about 90db 4. Battery capacity: 1200mAh 5. Built-in voltage: 3.7V 6. Normal volume playback: about 4h 7. Frequency response: 120Hz-20KHz 8. Charging voltage: 5V/500mAh 9. Charging time: about 2.5h 10. Support Bluetooth music/TF card music/external music auxiliary input 11. Aluminum alloy shell, high quality and durable 12. Stereo and bass effects, support FM radio
