Model - Microsoft Surface Dial, Type - Surface Dial, Connectivity - Bluetooth, Feature - Press and hold: For menu, Rotate: Freely/continuously (both directions); 0.30 N-cm resistance torque, Click: Activates a momentary switch with 300g force; Rotate detection functional in up and down button positions, Dynamic feedback: Provides tactile feedback in software adjustable increments, On-screen detection: Touch digitizer reports the onscreen location through a capacitive pattern (Studio only), Compatibility - Surface Pro 4, Surface Book, Surface Studio, All Windows 10 devices, Others - Frequency: 2.40 GHz, Wireless Range: 2 meters, Capacitive-touchscreen detectable, Casing: Aluminum, Weight: 145gm, Power: 2 AAA alkaline batteries, Part No - 2WR-00001, Dimensions - Dial: 59 x 30mm, Base: 54 x 4mm, Warranty - 1 year