By certification 
speakers subwoofer portable bluetooth speaker bluetooth speaker with led light
Product Description
1. BT version: 3.0
2. hands-free call function
3. Frequency range: about 10 meters
4. Playback time: up to 6 hours
5. Charging time: about 1.5 hours
6. Transmission frequency range: 2.4-2.48GHz
7. Battery type: 300mAh Lithium-polymer
8. Product size: 60*28mm
9. Product weight: 50g
10. SNR: more than 85DB
11. Impedance: 4 ohms
12. Distortion: less than 1% 13.french Macaron cake shape,surface finish with rubber oil
