(1)Bluetooth version:Bluetooth v2.1+EDR

(2)Working Range: 10meter
(3)Built in 400- 500ma rechargeable battery
(4)Working time: 3-5 hours
(5)Support A2DP V1.2, AVRCP V1.4 profiles;
(6)Support Line-in and hand-free, with internal mic
(7)Support music from TF card directly
(8)Distortion: <0.5%
(9)Frequency response: 20HZ-20KHZ
(10)Loudspesker output: 4Ω3W
(11)STN: ≥85±2dB
(12)With LED indicating when working
(13)Unique design with body ring rotation to for volume control                                                               

(14)With excellent sound quality.