Xeel is a proposed hardware-based navigation system that Microsoft wants to promote for all Windows-based devices. Simpler devices, such as Smart Personal Objects Technology (SPOT) watches and alarm clocks, would feature a basic Xeel interface (shown at left) with an up and down arrow for navigating through lists and menu options, a green "Enter" button, and a red "Out" button that would close programs or otherwise let users escape from their current task. More complex devices, such as Tablet PCs, would have additional buttons (shown at right) to let users perform tasks such as moving back to a previous screen, switching between windows, and displaying additional menu items.

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