Eaton Magnetic Door Contact Radio Transmitter is designed to work with any Scantronic 868MHz narrow band receiver. When used with both internal reed switch and external sensors the transmitter takes up two zones (or channels) on the receiver. The external connector on the 01 variant is designed for fully supervised loop (FSL) sensors. It is compatible with Scantronic Homelink 7510 32 zone radio alarm system, Scantronic 762rEUR-00 2-channel receiver and Scantronic 768rEUR-00 8-32 channel receiver.