Mice : Dell Optical (Not Wireless), USB (2 buttons + scroll) Black Mouse Manufacturer Part : 570-11147 Dell Part : 570-11147 Connectivity : Wired –USB Tracking Sensor : Optical LED Cursor Tracking Speed (dpi) : 1000 dpi (Dots Per Inch) Buttons Qty : 3 (Left, right & Scroll Wheel) Color and Finish : Matte Black Dimension(H x L x W) : 35.8 x 112.2 x 63.4 mm Weight : 90g ±10g(including cable) Cable Length: 1800mm ±50mm Comfortable & Easy to Use The Dell USB Optical Mouse delivers smooth and accurate cursor control. It is also designed to provide good comfort during use. Easy to Setup - Simply plug & play Ambidextrous Shape - Can be used comfortably in either hand 1000dpi Sensitivity - Smooth and accuracy cursor control