Features: 1.MULTIMETER: this multifunctional meter can measure DC voltage, current, power, charging capacity, time, and other physical quantities at the same time; can be directly used, no need shunt. 2.MEASURE RANGE: Digital multimeter can messure voltage range DC 0-90V, current range 0-20A, power range 0-9.99KW, capacity range 0-999Ah, time range 0-99.9 hours. 3.LCD COLOR DISPLAY: the voltage current power panel gauge adopts 1.8 inch LCD color screen, can be seen even under sunlight; LCD display will automatically turn off after two minutes if current less than 50mA, pressing any key can turn off, or it will wake up automatically when the current is greater than 50mA. 4.DATA STORE: The battery tester can automatically save the parameters when the display power off; if the monitor module also needs to power off, press OK button can save the parameters. 5.BIDIRECTIONAL DETECTION: it's bidirectional, can detect and display current of charging and discharging. Note: it can not detect current of two directions at the same time. Parameters: Voltage Measurement Range: Self-supply Power: DC 10~90V External-supply Power: DC 0~90V Current Measurement Range: 0~20A Display Resolution: Voltage : 0.01V Current : 0.01A Time : 0.01H Capacity : 0.01AH Current Precision: 1% + 2 digits Voltage Precision: 2% + 5digits Measurement Rate: 5 times/sec VOP( Over-voltage Protections): 0.01V~90V OPP( Over-power Protections ): 0.01W~9.99KW OCP( Over-current Protections ): 0.1~100A OAH( Over-AH Protection ): 0.01AH~9999AH OFT( Over-time Protection ): 0.01H~99.9H Open Holes (mm): 76.5*39.2(mm) Size: 794352(mm) Note: There is no relay with this version, therefore, LOP(low voltage protection) function can not be used. We have more detailed user manuals. If you need an electronic manual, please contact us. Package Includes: 1x Multifunctional Meter