Wireless Technology: Works up to 30 feet of wireless distance. Operates on 12 different channels, each with 65,536 different IDs Auto Sleep Design: Maximizes your battery life up to 6 months. Compact and Portable: Ultimate space saver and easy-to-carry on the go. Durable and Spill Resistant Design: Drain holes in the keyboard prevents damage of accidental water, coke or coffee spill. Micro-switch: Up to 6 million times lifecycle Membrane Switch: 5 Million keystroke lifecycle for a quiet and fast typing experience. Nano Receiver: Tiny and convenient to plug into to your laptop or tablet. Multi-Media Hotkeys: Provide ease of access to some of the most used functions. Enhanced Optical Sensor: Tracks accurately and precisely on different surfaces, like marble, wood and leather surfaces. Wireless Technology: Works up to 30 feet of wireless distance. Operates on 12 different channels, each with 65,536 different IDs.