Cebek CD-43 module is a 4-digit up/down counter, with last count memory. It can count up from 0 to 9999 when it receives pulses from a closing contact like a push button or switch or by injecting an external signal (12VDC). It includes a memory function which allow it to store on an internal E2prom the last data when the module is switched off. Displaying again when the unit is switched back on. The module also has the facility, by throwing a switch, to count down from the displayed count. The module also has a reset signal input, which allows you to reset the count at any time.