Edition: Bluetooth V2.1+EDR; Frequency coverage: 2.402GHz~2.480GHz ISM Band; Transmit Range: <=10m; Frequency Response: 20Hz~20KHz; Support software agreement: HFP A2DP AVRCP; Battery: Lion DC5V300mAh; Charge Time: <4H; Standby time: about 200h (battery saturation); Product size: 17.2 x 16.8 x 5cm; System Support: Windows 7 / XP / Vista / Linux 9 / Mac OS 10 etc.; 100% Brand New!100% Quality Warranty! High flexibility; Free to rotate without deformation; Easy to carry; Wireless enjoy Hi-Fi stereo music from computer which w/ built in bluetooth drivers; Answer and dial out phone calls automatically; Omin-directional microphone; Clear voice.