EH0245B Features 2.4GHz wireless keyboard and mouse Palm-sized dimensions Up to 10 meter operating distance Windows multimedia control General Specs Brand & Model N5903 Wireless Technology Two-way 2.4GHz Input Keyboard: DC 3v 30mA， Receiver: DC 5v 80mA Operating Range Up to 10 meters Power Supply  2 x AAA battery Port USB System Required Windows 98/2000/XP/Vista/7 Package Details Weight: 181.90 g Size: 14.5*13.5*4.7 cm Package Includes * N5903 2.4GHz Palm-sized Wireless Keyboard & Mouse