ACK-540 RF • Wireless mini-keyboard with built-in touchpad with 2 mouse function keys • Far-ranging and reliable radio- frequency transmission at 2.4 GHz up to 33 ft • Extre- mely flat construction with built-in hand cushion • Full functionality of a standard layout keyboard due to built in numeric keypad and 12 function keys • Ex- tremely silent stroke and tactile feedback due to high quality “X-Type” membrane technology • Plug & Play • Ideal use for home theater, conference and presentation facilities