The D-TECT X Receiver is a 500 metre range, 4 channel receiver expandable to 16 channels. The receiver is compatible with the D-TECT X ranges of wireless detectors and communication using 868MHz transmission protocol. This D-TECT X receiver can be expanded with the addition of up to three further 4 channel expansion modules. This allows the receiver unit to monitor the active state of up to 16 wireless D-TECT X movement detectors.