Test Kit for Comelit wireless device installations. Designed for advance testing of the radio signal strength between the expander and the device so as to guarantee proper operation of the wireless system once it is installed and allowing the installer to choose the best position for device operation. This diagnostics kit does not require specific configuration; once it is switched on and the device has been paired with the expander, it is ready to use. The signal strength is shown on the expander module display and can also be indicated through the flashing of the LEDs on the detector which, depending on their colour, indicate the quality of the signal between the 2 pieces of equipment. The kit, housed in a case to allow convenient transportation, consists of: an expander and a wireless detector, plug-in power supply unit and ducting for creating the required extension to be fitted to the sensor body. The expander module is supplied as standard with 5 x CR123A batteries to guarantee battery operation whenever power supply sources are not available at the site.