CK0212B Features Three-in-one multifunction wireless keyboard QWERTY full-function mini keyboard Mini-receiver 71 black backlight keys design allows you to use it in the evening or a dark environment Multimedia control keys Multi-point touch screen operation can replace mouse and offer you accurately control the cursor General Specs Model 250FUSK Type 2.4G wireless mini keyboard Color Black Function Keyboard， touchpad， flashlight (standard) or laser pen  Multimedia Control Keys Yes Battery Built-in rechargeable lithium polymer battery Working Range  10 meters Operating Voltage 3.3 V Working Current  <12 mA (without backlight) Charging Voltage 4.2- 5.05 V  Charging Current <300 mA Systems Supported Windows， Mac and Linux systems  Keys 71 black backlit keys  Dimensions 155 x 61 x 12 mm  Weight 102 g Package Details Weight: 289.97 g Size: 19.00*10.5*5.4 cm Package Includes * Wireless Mini Keyboard