HP 635 Multi-Device Wireless Mouse On the Road. In the office. With one device or many. However you work, and whatever you work on, this is one mouse that's ready for anything. With 4 programmable buttons and customisable scroll speed, the HP 635 Multi-Device Mouse adapts to the way you work. - Connection via Bluetooth or USB - 9-button mouse with scroll wheel and track-on-glass sensor - Pairs with up to three devices - Adjustable DPI: 800 to 3000