Perfect for lecture demonstrations. Project your meter readings on an overhead projector so everyone in class can clearly see the results. The transparent plastic base and easy-to-read scales make these projection meters ideal for class demonstrations. Each meter has a dual range with clearly-marked and easy-to-use binding posts. The voltmeter ranges are -1—3V and -5—15V. The ammeter measures 0.1 A—0.5 A and 0.5—2.5 A.