XTKR22A
The compact, water-resistant X10 4-Button Credit Card Controller is aptly named for its small, credit-card style design. Keep it in your wallet or purse and conveniently control up to four X10 modules. Turn on/off devices connected to Appliance Modules, dim/brighten lights connected to Lamp Modules, trigger ActiveHome macros and more!
In the default state (after first fitting the battery) the Controller is set to Housecode A. The first (top) two ON/OFF buttons control modules set to Unit Code 1. The second two buttons control A2, the third A3, and the fourth A4.