Logitech MK540 Advanced Wireless Keyboard & Mouse Combo

Connectivity: 2.4 GHz wireless via a single Logitech Unifying USB receiver (up to 10m range). Keyboard Battery Life: Up to 36 months of power using 2 x AA alkaline batteries. Mouse Battery Life: Up to 18 months of power using 1 x AA alkaline battery. Keyboard Layout: Full-size layout with integrated palm rest and 3 adjustable tilt positions (8° and 4°). Mouse Tracking: Advanced optical tracking with an ambidextrous, contoured design and soft rubber grips. Durability: Spill-resistant design capable of withstanding up to 60ml of liquid. Hotkeys: Dedicated one-touch media keys, display brightness controls, and programmable Fn-keys.