Surface Pro Signature Keyboard Unrivalled comfort, ultimate flexibility Surface Pro Flex Keyboard with Slim Pen is designed with inclusivity in mind, featuring a precision haptic touchpad that allows you to use it with different parts of your limbs, including your palm or residual limbs. Surface Pro Flex Keyboard with Slim Pen also empowers you to work more comfortably by placing your device and keyboard where it feels most natural to you | Battery Up to 41 hours of continuous typing while detached | Bluetooth Low Energy | 1-year limited hardware warranty