The PDX-DCT10 is a Wireless Door Contact from Paradox. The DCT10 can support two inputs simultaneously (reed switch & universal input). When using the DCT10 in conjunction with a Magellan receiver, it will transmit two different serial numbers (SN), one for each input, which are always SN and SN+1(e.g. 240000 & 240 001). When using it in conjunction with an Omnia receiver, it will transmit only one serial number (either reed switch or universal transmitter). A switch or other security device can be connected to the universal transmitter input terminals to provide wireless transmission of the device's open/closed status.