Wireless Keyboard, UV Coating Keyboard Mouse Set for Office Gold Specification: Item Type: Keyboard Mouse Set Material: ABS Keyboard Battery Type: 2 x AAA Batteries Required (not included) Mouse Battery Type: 2 x AAA Batteries Required (not included) Support System: Compatible with Mainstream Operating Systems Applicable Equipment: for Desktop Computers, Mobile Devices, Tablet Computers, Etc. Package List: 1 x Keyboard 1 x Mouse 1 x Adapter Note: The adapter is on the back cover of the keyboard battery. If not, it is on the back cover of the mouse battery. The keyboard and mouse share a USB adapter! The delivery does not come with batteries, please prepare 2 AAA batteries for each keyboard and mouse. UV Coating: The wireless keyboard features UV coated keycaps and etched ABS keycaps, which prevent sweating and damage to the keycaps Comfortable Ergonomics: The keyboard mouse set has an ergonomic design with glossy lines, comfortable hand feel and anti fatigue Mute Button: The wireless keyboard has a mute button so you can enjoy comfortable and glossy typing and percussion