Dual Battery Voltage Monitor. 12/24 volt Can be set up for high and low voltage warning levels on 2 battery circuits. Warning is indicated by highlighting the voltages on the display, and an integral buzzer can also be enabled. The warning is delayed 5 seconds to prevent spurious warnings. The monitor also has a clock function and automatic sleep functions. Panel Mount. Dimensions: Length 56mm x Width 20mm x Height 66mm.