This Microsoft 5050 Comfort keyboard and mouse desktop set features reliable wireless connectivity up to 30 feet. The keyboard features an ergonomic, curved design to encourage a more natural posture, aligning arms, wrists and hands for greater comfort. The keyboard also features Advanced Encryption Standard (AES) technology, which encrypts your key strokes and a built-in palm rest for additional comfort. The ambidextrous mouse is designed for comfortable use in either hand, with BlueTrack Technology, which combines the power of optical with the precision of laser for remarkable tracking on virtually any surface. This set includes both a black keyboard and mouse.