With its split and sloped keyboard, adjustable reverse tilt and built-in wrist rest, this ergonomist-approved Pro Fit Ergo Wireless Keyboard positions your hands for improved control. Split and sloped design positions your hands, wrists and forearms for comfort and neutral alignment. Built-in wrist rest supports, cushions and cradles your wrists. Quiet keys allow smooth, easy, nondisruptive typing. Spillproof keys meet MIL-STD-810H Method 504.3 Contamination by Fluids testing to resist breakdown when exposed to cleaning and disinfecting solvents, such as alcohol and bleach, for at least 24 hours. Enjoy the flexibility of 2.4 GHz and Bluetooth 4.0 LE with government-grade encryption. Three-mode, power-saving switch lets you toggle between 2.4 GHz, Bluetooth and Off for better battery life. Popular features, including Caps Lock, Numbers Lock, Scroll Lock and F-Keys, allow you to type and navigate easier and more efficiently.