Features:1. Multimeter: This multi-function meter can measure DC voltage, current, power, charging capacity, time and other physical quantities at the same time; It can be used directly without the need for a shunt.2. Measurement range: the digital multimeter can measure DC voltage range 0-90V, current range 0-20A, power range 0-9.99KW, capacity range 0-999Ah, time range 0-99.9 hours.3. Color LCD Display: voltage current power panel adopts 1.8 inch color LCD screen, can be seen even in the sunshine; The LCD display will automatically turn off after two minutes if the current less than 50mA, pressing any key can turn off, or it will wake up automatically when the current is more than 50mA.4.DATA STORE: the battery tester can automatically save the parameters when the display power is off; If the monitor module also needs to turn off, press the OK button to save the parameters.5. Bi-directional detection: it is bi-directional, can detect and display the charge and discharge current. Note: It can't detect current in two directions at the same time. Parameters:Voltage Measurement Range:Self-Supply: DC 10 - 90Veernt Power Supply: DC 0 - 90VAt. Measurement Range: 0 - 20ARuvenance Rating:Voltage: 0.01VArect: 0.01ACs: 0.01AHnth Precision: 1% + 2 DigitsVoltage Accuracy: 2% + 5 DigitsMeasurement Rate: 5 times/secVOP (Over Voltage Protection): 0.01V - 90VOPP (Over Power Protection): 0.01W - 9.99kwOCP (Over Current Protection): 0.1 - 100AOAH (Over-AH Protection): 0.01ah - 9999AHOFT (Over Time Protection): 0.01H - 99.9HOopen Holes (mm): 76.5*39.2(mm)Size: 79 43 52(mm)Note: There is no relay in this version, therefore the LOP (Over Voltage Protection) function cannot be used. We have more detailed user manuals. If you need an electronic manual, please follow . Package Included:1x Multi-Function Meter