Brand: Microsoft. Connection: USB. Detachable Palm Rest: No. Features of Product: Advanced ergonomic design, 2.4-GHz wireless technology. Ergonomist approved - 14-degree cable, 12-degree split, curved keybed, 7-degree reverse slope. Mouse ergonomically designed to promote a more natural wrist posture. Keyboard Batteries Supplied: No. Keyboard Battery Requirement: N/A. Mouse Battery Requirement: 2xAA. Mouse Programmable Buttons: Yes. Mouse Retractable Cable: No. Mouse Type: Laser. Multimedia Hotkeys: Yes. No of Mouse Buttons: 5. Scroll Wheel: Yes. Slim Design: No. Wireless Keyboard: Yes- 2.4GHz. Wireless Mouse: Yes- 2.4GHz.