-  Material : Aluminum & Plastic  
-  Bluetooth V4.0+EDRSupport: HSP,HFP,A2DP,AVRCP  
-  Bluetooth transmission distance: 10M
-  Built-in 3.7V/1000mAh lithium-ion battery; Play time: approximately 3 hours
-  Harmonic distortion 3*2W
-  THD: ≤7%
-  frequency range 65HZ-20KHZ
-  S/N: :   >75dB
-  Distortion rate:  ≤0.5% at 1w 1000HZ
-  40MM round shape , internal magnetic 4Ω/3.5W
-  External Connectors :Micro usb
-  D: 102*102*40mm