A science-driven ergonomic keyboard that promotes a more relaxed, natural typing experience designed for hours of comfortable use. A fluid and ultra-precise typing experience with no compromise in speed and accuracy. Your fingers glide effortlessly across the matte surface of the keys, and tactile details make it easy to orient your fingers and stay focused. The split layout and convex curve promote a more natural hand and finger placement.Package Includes: (2) AAA Batteries; Unifying USB Receiver; Quick Start Guide