The KP21 keypads provide simple, intuitive control of remote zone functions includes zone power, source selection, source control, monitoring, paging and timers. The wall-mount keypads fit most standard 2-gang new construction and retrofit J-boxes. The 2.5” LCD and 14 function keys provide menu driven control and setup functions for simple source, zone and system operation. The KP21’s also feature an on-board ultra-efficient 50 Watts per channel digital stereo amplifier. Placing the amplifier in the local room, creates crisp, clear and powerful audio reproduction by reducing the distance between the amplifier and the local speakers. Each keypad has a local variable line level output allows incorporation of local high-power amplifiers or powered sub-woofers Line level audio from a local source can be run through the keypad amplifier and zone speakers using the keypad’s stereo line level input. Each keypad features a built-in microphone for whole-house paging and an IR sensor allows control from the KP21R hand-held zone remote control or other properly configured programmable remote. An external IR sensor can be added to provide additional control flexibility.