IGB1073 Features: * Foolproof, dependable testing * Accurately tests state of charge within temperature extremes of -40° to 130° F * Uses less than 1/4 oz. of acid, easy to use * Easy to read * Features unbreakable rubber tip, leak-proof container and pocket protector * Charg-Chek Battery Tester Warranty: * 1 yr warranty on material and workmanship