M2 DC VoltmeterMonitors DC Voltage on large, bright display. Accurately measures and monitors the voltage of up to three batteries.Features: Auto-dimming, bright OLED display is easy to read Easy to adjust 92dB alarm on all models Isolated MOSFET relaySpecifications: Meter: Voltage Function: 8 to 70V Resolution: 0.01V DC Alarms: High/Low Voltage Display Size: 55mm x 28mm Input Voltage: 7-70V DC Maximum Power Consumption: 1.00Watt Minimum Power Consumption: 0.3 WattWARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov. Owner’s Manual (pdf)