It DoesnT Take Long For The Dead Pests Under Your Trap To Be Scavenged By Other Animals - While YouRe Not Looking - So You May Not Always See Evidence Of Your Success. To Put Your Mind At Rest, WeVe Designed A Digital Strike Counter To Do The Counting For You. The Compact Digital Counter Slides On To The Co2Canister In Your A12 Trap For Possums Or A24 Trap For Rats And Stoats. The Counter Is Easy To Check And Reset And Spends Most Of Its Time.. See full description for further details