2.4 GHz RF Wireless Technology - This keypad works at any angle with a range of up to 30 ft. with no wires to get tangled. Compact & Lightweight - The WKB-6010UB only weighs a quarter of a pound and is less than three and a half inches wide which makes it extremely portable and space saving. Spill Resistant - The keypad’s spill resistant design helps to prevent fluids from staying inside, which would otherwise cause damage to the keypad. Quiet Membrane Key Switches - Membrane key switches provide a quieter typing experience with lifecycle lasting up to five million keystrokes. Plug & Play - The WKB-6010UB requires no driver. Simply connect the device to your computer and begin enjoying your new peripheral companion.