W9710RF 2.4G Wireless Multimedia Keyboard with Tracking ball(Black)

1)Touchpad buttons 2)14 Multimedia hotkeys,multimedia control is easy 3)2.4GHz Wireless technology 4)Up to 10 meters interruption-free receiving 5)Build-in optical tracking ball with control of mouse function. 6)Batteries:2*AA batteries(included) 7)USB rec