Wide Compatibility: Compatible with Cellphone Tablet PC laptop Desktop with Android Windows 2000/ Me/ 98SE/ XP /Vista/ 7/ 8/10 system. (NOTE: This number pad is NOT completely compatible with Mac OS system and iOS system, Calculator Key and Functional Keys can't work but other number and symbol keys including ESC, Tab work well.) Bluetooth 3.0 connection: Bluetooth 3.0 technology provides a cable-free & clutter-free connection,also saves USB port.very stable and reliable,no device drivers needed,no dropouts,fast data transmission,operating distance 10m(32.8ft).wireless design lets you take the Keypad anywhere.[NOTE: For Desktop PC Laptop without bluetooth function,you need to use third-party bluetooth adapter(not included)before use] Multi-Function & Silent: This wireless numeric keypad has 22 keys with multi-function,With NumLock,ESC,Backspace etc,and a shortcut key which can open the computer calculator directly.Assist in accounting tasks, excel spreadsheets,and more to expand your existing keyboard.Great for spreadsheets worker,accounting staff and financial officer.Convenient to use in your office,home or business trip. Comfortable Ergonomic Design: This Scissor-Switch keyboard provides you with very comfortable and pleasing typing experience.15 tilt design fits the human body habits to prevent wrist strain with a tilted slope, Rubber Pads on back provide optimum comfort and securely keep the keypad in place.The wireless 22 key numpad is the perfect gift for bookkeepers working on excel,teachers entering grades,office workers for data entry,etc. Power Saving: Power supply by 2* AAA battery(not include). When no any operations about 3s,this numerical keypad will enter into dormant mode automatically,just press any key to awake up the keypad.Energy saving,extended battery life.