Hassle free performance with 2.4GHz Wireless Transmission Auto connect with Smart Link technology Water resistant design Extra Comfort with Big Enter, Back space & Space bar keys Sealed membrane sheet for greater reliability Long battery life and low battery indication Universal Back & Forward buttons Special housing to store nano receiver On/Off switch to save battery life Mouse Type : Optical Mouse Buttons : 5 Buttons Keyboard Type : Standard Keyboard Total Keys : 103 Keys Switch Life : 10 million life cycles Cordless Technology : 2.4GHz Wireless Radio Frequency Effective Range : Upto 10 meters Batteries : Keyboard - 2 x AAA size, Mouse - 2 x AAA size Interface : USB Interface Cordless Receiver : Nano USB Receiver OS Supported : Windows 2000 / XP / Vista / 7 / 8 From the Manufacturer iBall Dusky Duo Wireless Keyboard with Wireless Mouse The incredibly stylish and innovative iBall wireless keyboard offers hassle free performance. Featuring 2.4GHz wireless transmission, you’ll experience practically no delays, even in busy commercial environments such as airports, coffee shops, or offices. Made from spill-proof material, This keyboard can easily resist stains and liquid spills. It is compatible with a number of computer systems that support Windows 2000, Windows XP, Windows Vista, and Windows 7 operating system. Featuring an ergonomic design, this iBall wireless keyboard is extremely comfortable. The spacious layout and over-sized Enter, Backspace and Space bar keys lend maximum comfort while typing. The sealed membrane sheet adds to the overall protection. With an impressive battery life, this keyboard will last long. This Dusky Duo keypad also includes universal forward and back keys for an accurate and comfortable typing experience. A special port is designed for the Nano receiver that is useful for turning the mouse on and off. This iBall Dusky Duo keyboard is cable-free, so you’re free to type from a distance of up to 10 metres. It can be placed in front of your computer or even on your lap. With a convenient on and off switch, you can save on battery power. This wireless keyboard and mouse is available on the Amazon online store. Note : USB is included with the product and kept at back side of the mouse .