Velleman-Multifunction-Up-Down-Counter-Kit-Velleman-K8035-p-This-project-kit-from-Velleman-Contains-everything-required-to-build-a-multifunction-up-down-counter-When-assembled-the-counter-is-a-very-practical-unit-that-is-ideal-for-a-range-of-applications-such-as-piece-part-counting-score-keeping-crowd-tallying-Counting-input-is-either-by-on-board-push-button-or-via-external-pulse-input-&-the-unit-will-count-either-up-or-down-Readout-of-count-is-via-four-7-segment-LED-displays-&-the