DROK Charge-Discharge Monitor, DROK 0-90V 100A DC Ammeter Voltmeter, Battery Capacity Amp-Hour Watt-Hour Power Time Multimeter, LCD Display Digital Voltage Current AH WH Watt Meter Tester with Hall Sensor

* 7-IN-1 MULTIMETER --- measure and display voltage (0-90V), current (0-100A), power, battery capacity, amp-hour, watt-hour and time simultaneously. * APPLICATION --- can be used as battery charge-discharge tester meter for automobile and car battery; as battery capacity monitor for photovoltaic system; as voltage meter, current meter, power meter, etc. * BIDIRECTIONAL AMMETER --- the multimeter can detect current in dual direction without changing the wiring direction when used for monitoring charging and discharging. * PROTECTION --- over-voltage protection, over-current protection, over-power protection, over-charged protection, time limitation, etc. * OTHER FEATURES --- LCD color display; AH power off memorized function; time & AH resettable; calibration function; automatically/manually switch off LCD screen; with output control button to enable/disable output (requires a relay).