Keyboard and mouse work at any angle with a range up to 30 ft with no wires to get tangled. Ergonomic split keyboard design with integrated palm rest. 7 multimedia hotkeys on keyboard and optical sensor on mouse. 2.4 GHz wireless technology with on/off swith. Built-in scroll wheel. 2 "AAA" batteries for keyboard and 1 "AAA" battery for mouse (included). 1-year warranty. English. Black.