Microsoft Wireless Desktop 3050 with AES (PP3-00001) Advanced Encryption Standard AES 128-Bit Encryption. USB Compatible. Mouse Button features 5 buttons including scroll wheel button Built in palm rest helps support and straighten wrists Wireless for increased freedom. Clean only with dry cloth. Do not use near any heat sources. Customizable shortcut keys to easily access your favorite programs Works on virtually any surface with BlueTrack Technology Ambidextrous design is suitable for use with either hand