Check the listing for details. Ecolink WST-100 4-Button Wireless Remote – DSC 433MHz Compatible Keyfob. Condition: Used. Listed at 15.00 USD. The Ecolink WST-100 4-Button Wireless Remote is a keyfob compatible with DSC 433MHz security alarm systems. This remote allows users to easily arm and disarm their home security system with the touch of a button. With its compact size and wireless functionality, the Ecolink WST-100 provides a convenient and secure way to control your home's alarm system from anywhere in the vicinity.