The Lapdock 500 and the Lapdock 100 are optional Webtop accessories for the Motorola Droid Razr. Together with the Webtop application on the Droid Razr, these accessories turn the phone into a portable PC. When docked, a Linux-based user interface is launched. It provides access to Firefox and a slew of other Webtop apps. The Lapdock 500 has an Ethernet connector that provides power as well as Internet connectivity.