Wireless keyboard & mouse set features an ergonomist-approved design that keeps your hand in a natural position for improved comfort. Split & sloped keyboard with adjustable reverse tilt positions your hands, wrists & forearms for comfort & neutral alignment. Built-in wrist support cushions & cradles wrists to prevent strain through extended use. Dual wireless design with 128-bit AES encryption security provides the flexibility of 2.4 GHz & Bluetooth 4.0 LE for a reliable connection. Quiet clicking provides smooth, nondisruptive use in low-noise environments. Spill-proof keys make cleanup fast & easy. Five-button mouse enhances your navigation & productivity. Three-mode, power-saving switch allows you to toggle between 2.4 GHz, Bluetooth & Off for the best battery life. Caps lock, numbers lock, scroll lock & F-keys make typing & navigating easier & more efficient.