7-IN-1 MULTIMETER --- This monitor measures and displays current (0-100A), voltage (0-90V), power, battery capacity, amp-hour, watt-hour and time simultaneously on its clear easy to read LCD color screen. WIDE APPLICATION --- The multifunctional detector can be used as battery charge-discharge tester, meter for automobile and car battery, battery capacity monitor for photovoltaic system, voltage meter, current meter, power meter, etc. And will be much more convenient with the extra 1 meter shielding wire. BIDIRECTIONAL AMMETER --- The multimeter can detect current in dual direction without changing the wiring direction when being used for monitoring charging or discharging. USE --- With various protections: over-voltage protection, over-current protection, over-power protection, over- protection, time limitation, etc. It will be a tester to enjoy your work. OTHER FEATURES --- LCD color display; AH power off memorized function; Time & AH resettable; Calibration function; Automatically/manually switch off LCD screen; Connect the volt amp meter to a relay to use the output control button to enable/disable output. NOTE: This multimeter doesn' contain a relay. Current Power Battery Capacity AH WH Time Multimeter Measuring Parameters: Voltage, current, power, battery capacity, amp-hour, watt-hour, time. Voltage Measurement Range: DC 0-90V Current Measurement Range: DC 0-100A Voltage Measurement Accuracy: 2% 5 digits Current Measurement Accuracy: 3% 5 digits Display Resolution: 0.1A, 0.01V,0.01AG, 0.01H(1 min) Measurement rate: 5 times/second Display: 1.8 inch LCD color screen Meter Overall Dimension: 79x43x26mm/3.11x1.69x1.02 inch Meter Opening Hole Size: 76.5x39.2mm/3.01x1.54 inch Hall Sensor Size: 57x32x50mm/2.24x1.26x1.97 inch (with screw and copper pillars) Hall Sensor Hole Diameter: 20mm/0.79 inch Protection Function: OVP (Over-voltage protection): 0.01V-90V OCP(Over-current protection): 0.1-100A OPP(Over-power protection): 0.01W-9.99KW (Low-voltage protection): 0.01V-90V (Over-charge protection): 0.01AH-9999AH OFT(Over-time protection): 1min-99hour59min Material:Metal + plastic colour:Black Package Contents: 1 set x Bidirectional Volt Amp Meter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.