. The EN1224-ON pendant is a four button, four condition transmitter that includes both on and off buttons. The EN1224-ON utilizes a 250 millisecond de bounce time to activate conditions, and to help prevent false activation. This pendant transmitter must be used with an Echo Stream universal serial receiver, security only serial receiver, or with the network coordinator. In addition, the application controller (e.g. control panel) must be designed to accept the on/off conditions.