Lascar EMV 1200 Series 3 Digit LCD Voltmeters Panel Mount – Lascar EMV 1200-40, This 3 digit LCD panel meter measures and displays DC voltages, with a range of 4 to 40V DC. The meter is powered by the signal being measured and only valid readings are displayed. The unit is easy to mount, requiring just a single circular hole. Lascar EMV 1200-40 3 Digit LCD Voltmeter