M2 AC MultimeterMonitors AC Amps, Volts, Hzs on large, bright display. Supports programmable current transformer ratios. Accurately measure and monitor AC amperage, voltage and Hz. (measures 2 voltages and 2 circuits)Features: Auto-dimming, bright OLED display is easy to read Easy to adjust 92dB alarm on all models Isolated MOSFET relay Specifications: Meter: Current, Frequency, Power, Voltage Function: 50 to 250V to 300A Alarms: High/Low Current, High/Low Frequency, High/Low Voltage Display Size: 55mm x 28mm Input Voltage: 7-70V DC Maximum Power Consumption: 1.00Watt Minimum Power Consumption: 0.3 Watt WARNING: 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).embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }