1-Weight:44g 2-Dimension:38x38x11mm 3-Chipset:CSR BC03 4-Operation time:4 hrs 5-Standby time:200 hrs 6-Battery:Built-in,Rechargeable,Lithium-Polymer 7-Bluetooth Profile:A2DP,AVRCP,HSP,HFP 8-Radio:FHSS,2.402~2.480GHz,Sensitivity:<0.1%BER@-80dBm 9-Frequency Response: 20 Hz - 20 KHz 10-Color:Black