ERGO K860’s curved keyframe places your hands, wrists, fingers and forearms in a more natural posture you’ll notice the lack of strain the moment your hands land on the keyboard. ERGO K860 has even been proven to reduce muscle activity by 21% in the upper trapezius muscle — key muscle in the center of the back that stabilizes and facilitates shoulder and neck movement. ERGO K860’s curved keyframe places your hands, wrists, fingers and forearms in a more natural posture you’ll notice the lack of strain the moment your hands land on the keyboard. It has even been proven to reduce muscle activity by 21% in the upper trapezius muscle key muscle in the center of the back that stabilizes and facilitates shoulder and neck movement. Keep your wrists in a natural and comfortable posture, whether you’re seated or standing with an innovative palm lift feature. Tilt legs of 0, -4, and -7 lift your palms into the optimal ergonomic position depending on your unique set up. Includes Ergonmic keyboard, USB Receiver, 2 x AAA Batteries, Quick start guide. Optical sensor. Wireless range 10m. Nano receiver. Approximately 24 months battery life. Batteries required 2 x AAA (included) . Manufacturer’s 2 year guarantee. EAN: 5099206094963.