Features: 1.2.4G Wireless: Easy and fast operation with a USB receiver, 2.4G wireless technology extends the range of the mouse up to 33 feet, clean and space saving. 2.3 Levels DPI Adjustable: You can use 3 levels of DPI, 800DPI 1000DPI 1200DPI three levels of adjustable cursor sensitivity, noise canceling keys and quiet clicking allow you to focusing on your work without disturbing others. 3.Ergonomic Design: The keyboard has a tilt angle to fit the typing position, ergonomic design, plug and play for travel or on the go. 4.Quiet Button: Scissor type key structure provides super glossy typing experience, using the quiet button, you can enjoy comfortable and glossy typing. 5.Wide Range: Wireless keyboard mouse set works with all major operating systems, including desktop computers, mobile devices, tablets and more. specification:Item Type: 2.4G Wireless Keyboard Mouse Combo Material: ABS Color: Black Keyboard Battery Type: Requires 2 AAA Batteries (Not Included) Mouse Battery Type: Requires 2 AAA Batteries (Not Included) Mouse DPI: 800/1000/1200DPI Support System: Compatible with All Mainstream Operating Systems Applicable Devices: for Desktop Computers, Mobile Devices, Tablet PCs, Etc. PackageList: 1 x Keyboard (Battery Not Included) 1 x Mouse (Battery Not Included) 1 x Adapter NoteThe adapter will be placed inside the mouse battery cover or inside the keyboard battery. Please check it carefully!