Get all the perks of a quality Lenovo-built keyboard and mouse combo without breaking the bank [Waterproof design]: Enjoy the peace of mind that comes with a waterproof design. Our splash-proof keyboards are constructed from an exoskeleton engineered to quickly and safely drain spills away from vital components [The perfect fit]: Feel the comfort of a non-slip scroll wheel and an adjustable keyboard stand for extended use – all tailored to you [Performance]: Keyboard: 104Keys |Button Life: 8,000,000 Cycles | 3 LED Keys (Num Lock/Caps Lock/Scroll Lock) || Mouse: 3 Buttons without Programmable | Button Life: 3,000,000 Cycles (Left/Right), 300,000 Cycles (Middle/Encoder) | DPI: 1600 | Sensor: LED Optical Sensor | Scrolling: 2-way Scroll Wheel (Up/Down)