1. 2.4GHz Wireless Technology: Using 2.4GHz wireless technology, the USB receiver can be plugged in to connect and start the keyboard to use, no other software installation, no delay or dropped calls. 2. Retro Circular Key Design: All keys are removable, and the retro circular key design takes you back to the original typewriter . 3. Automatic Power Saving Mode: If you do not use the keyboard and mouse, the keyboard and mouse will automatically into sleep mode to save energy and greatly extend battery life. Click any key or button to reactivate. 4. Colorful Stylish: The wireless keyboard and wireless mouse are colorful, fashionable and beautiful, attracting more people's attention. 5. Wide Compatibility: Fully compatible with for Windows 10, 8, 7 and for XP operating systems. It is applicable to PC, desktop computer, loptop. Spec: Item Type: Wireless Keyboard Mouse Combo Material: ABS Connection Mode: Usb Receiver Connection Number of Keys: 86 Keyboard Size: Approx. 313 x 141 x 39mm / 12.3 x 5.6 x 1.5in Mouse Size: Approx. 111 x 59 x 27mm / 4.4 x 2.3 x 1.1in Mouse Dpi: Up to 1200 Keyboard Battery: 1 x AA (not Included) Mouse Battery: 1 x AA (not Included) How to Use: Use after installing the battery (not included) packing list: 1 x Keyboard 1 x Mouse 1 x USB Receiver1 x User Manual