iClever Wireless USB Numeric Keypad 18 Keys 2.4G Portable Slim Mini Number Pad for iMac, Laptop PC Highly compatibility: Works with iMac, MacBook, Laptop / Notebook, Desktop / PC Computer Compatible with Windows and OS X System Full-size 18-key Keypad: Compact wireless keypad consisted of 18 full-size and concave keys including backspace enables comfy input and improved productivity Plug and Play: Just insert the provided USB receiver into USB interface of your computer, no driver required. It allows cordless workspace and long working range up to 10m. Auto Sleep Mode: It enters into hibernation/sleep mode if no operation within 2 minutes, energy saving and frugal Reliable and Friendly Customer Service: Ready to respond within 24 hours and Lifetime Support Guarantee