Microsoft Surface Dial. Interface: Bluetooth, Product colour: Aluminium, Compatibility: Surface Pro 4, Surface Book, Surface Studio. Windows operating systems supported: Windows 10 Education, Windows 10 Education x64, Windows 10 Enterprise, Windows 10 Enterprise x64,.... Battery type: AAA, Battery technology: Alkaline. Width: 59 mm, Depth: 59 mm, Height: 30 mm