Check the listing for details. New Interlogix TX-E101 4-Button Wireless Remote Qolsys & GE 319.5Mhz Compatible. Color: Black, Condition: New. Listed at 19.99 USD. This Interlogix TX-E101 4-Button Wireless Remote is perfect for controlling your home security system. The sleek black design matches any decor while the 319.5Mhz compatibility with Qolsys and GE systems ensures easy integration. The unit runs on 3V voltage and is designed to last. Made in China, this keyfob unit is easy to use and comes with one unit quantity in the package. Get efficient home security with this new Interlogix keyfob.