The Lascar Electronics DPM 500S 3 1/2 Digit LCD Panel Voltmeter uses advanced components and construction techniques to provide a uniquely compact unit. The meter features a 3 1/2 digit LCD with 12.5mm (0.5") digit height, annunciators, and 200mV d.c. full scale reading. The DPM 500S is in a 40 pin DIL integrated circuit format that can be plugged directly into a DIL socket or panel mounted using the snap in bezel. For single rail use, the DPM 500S features a built in negative rail generator, enabling the meter to measure a signal referenced to its own power supply 0V.