Streamlined full-featured RF keyboard with built-in trackball optical technology. 2.4Ghz radio frequency, 15 meters effective working range, USB port 360-degree navigation, sleek and elegant and notebook keyboard module design, enables mobile operation and effortless typing. Perfect for Home Theather PC Keyboard/Keypad - Keyboard/Keypad Type: Keyboard - Keyboard/Keypad Connectivity Technology: Wireless - Keyboard/Keypad Wireless Technology: RF Pointing Device - Pointing Device Type: Trackball Integrated Interfaces/Ports - Interfaces/Ports: 1 x Type A Male USB Physical Characteristics - Dimensions: 1.97" Height x 15.16" Width x 7.01" Depth - Keyboard - Dimensions: 0.39" Height x 0.85" Width x 3.07" Depth - Receiver