Product specifications:
Wireless: V5.3
Support: L2CAP/A2DP/AVCTP, can receive AUDIO signal and control the AUDIO device.
Support HSP/HFP(Handsfree profile), with HANDS-FREE functions.
Working distance:10M
SNR:≥90db
Battery: 3.7V  1500mAh
Normal volume playing time: about 3 hours with LED light off
Speaker driver: ¢52mm*2
Speaker Power: 4Ω/5W*2
Frequency response:120Hz-20KHz
Unit size: 185.5*82*82.5mm
Unit weight: about 587g (not includ accessories)
Charging:5V/500mAh
Charging time:about 4H