1. Speaker: 40mm. 2. Wireless specification: Wireless V5.0 JL. 3. Supporting protocols A2DP, AVRCP, HSP, HFP. 4. Charging voltage DC 5V. Charging time: about 2 hours. 5. Call / music time: 8 hours. Standby time: 200 hours. 6. 300mAh Class A polymer battery. 7. Size: 186*180*75mm, weight: 187g. 8. Support Wireless, TF card, AUX mode playback.