The magnetic contact is an advanced magnetic contact sensor with integrated RF transceiver designed to be a fully supervised low-current device. A built-in reed switch and/or an external wired input may be applied in this device. To maximize security, an 8.2K end-of-line resistor is monitored on the external wired input. The Magnetic contact uses smart message control, which verifies that all messages are successfully transmitted, so that no intrusion event will be uninformed to the system. Each magnetic contact has a unique factory set ID code (24bit) which by registration is set into memory of the paired SHEPHERD™ Transceiver, enabling more secured communication and devices to be remotely controlled from a specific transceiver.