The Lascar Electronics SP 8-100 Splash-Proof Ultra Low Profile 3 1/2 Digit LED Panel Voltmeter features a 200mV d.c. measurement range with auto-zero and auto-polarity. Decimal points are user selectable. The SP 8-100 features a negative rail generator which enables the meter to measure a signal referenced to its own power supply 0V. The bright red LED display ensures excellent readability under low light conditions. The module is easily fitted into the panel, using the fixing clip provided. The module's low cost means it will suit high and low volume applications. The design of the panel meter's housing and seal ensures splash proofing in many applications.