Speaking of on the field, Microsoft is also updating the Surface tablets used by teams during games to review plays. This year, teams will use Surface Pro 3 tablets instead of Surface Pro 2 models. The Pro 3 models are lighter and larger than the Pro 2s, yet still have the same weather proofing and pen capabilities that coaches and players have become accustomed to. Microsoft updated the capabilities of the software, as well, letting coaches and players choose different colors for telestrator functions, as well as draw out plays on a white board. During the preseason, the Surfaces on the sidelines will be able to display video clips for the very first time, showing seven seconds of action for each play. Referees will be able to use the Surfaces to review calls that are challenged by teams during the preseason as well.