Cebek USB.CD-60.1 module is a 4-Digit up/down counter with pre-selection and relay output. Similar in operation to CD-5 but all controlled via your PC or Laptop. With a display size of 1". You can count up and count down from a DC voltage derived from a contact on the signal input. Count up function allows you to pre-select a number and once this number reach, the count up will be stopped and the relay is activated.