Left Hand Ergonomic Design, Optical Tracking Technology, Working On Many Different Surfaces And Ideal Usage For Home, Office Or Game. 2.4 Ghz Wireless Optical Mouse, Comfortable Touch Low-Voltage Alarming Function Prevention Of Mouse Hand The Dongle Can Be Stored Into The Mouse Neatly When It Is Not Used Receiver Storage Space And Carrying Easily Specification General Color: Black Features: Novelty,Slim,Gaming,Trackball And Touchpad,Multi-Touch Material: Abs Usage: Gaming Mouse Type: Vertical,Ergonomic Product Details Connection Type: 2.4Ghz Wireless Interface: Usb 2.0 Power Supply Power Supply: Battery Dimension And Weight Package Size (L X W X H): 13.00 X 9.00 X 7.00 Cm / 5.12 X 3.54 X 2.76 Inches Package Weight: 0.1000 Kg Product Size (L X W X H): 12.50 X 8.20 X 6.50 Cm / 4.92 X 3.23 X 2.56 Inches Product Weight: 0.0900 Kg