Bluetooth,wired, MINI usb 3style 1, with bluetooth2.0 Interface 2, support for Windows 98/ME/2000/XP/2003/VISTA operating system, Windows Mobile6.0 or Symbian S60 smartphone operating system compatible. 3, built-in lithium battery, full use of more than 3 months, giving charge line. 4, the appearance of total size: 284.5mm * 119.8mm * 6.70mm see photos 5 It can be used to connect a variety of desktop and notebook computers, can also support the Bluetooth HID protocol to connect a variety of portable electronic devices, PDA, UMPC, Pocket PC, Tablet PC and so on.