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Four rocker buttons used to send three sequential ON/OFF X-10 PRO commands and a BRIGHTEN/ DIM for the last command signaled, such as a module with dimming capabilities. The first command is the same Unit Code set on the XPT Base Transmitter and two sequentially above. Place the desired Keypad cover onto the XPT Base by inserting the tab on top of the Keypad under the notch on the XPT Base. Gently, but firmly press the bottom of the Keypad into place so that the pins on the back of the Keypad insert into the XPT Base socket. NOTE: The XPT, with a Keypad, does not switch any loads, it is a transmitter only.