The PM100 Pocket Multimeter from is an accurate, automatic, pocket-sized “6000 count” meter that deserves to live in every technician’s (or homeowners’) tool bag, if not pocket. It has a default power on “Auto” mode that magically checks for voltage and displays that if present, if not then it will attempt to measure resistance. The PM-100 is a go-to-tool for quickly checking electrical supplies and basic continuity.