Features: 1.MULTIMETER: this multifunctional meter can measure for DC voltage, current, power, charging capacity, for time, and other physical quantities at the same for time; can be directly used, no need shunt. 2.MEASURE RANGE: Digital multimeter can messure voltage range for DC 0-90V, current range 0-20A, power range 0-9.99KW, capacity range 0-999Ah, for 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 for 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 for time. Parameters: Voltage Measurement Range: Self-supply Power: for DC 10~90V External-supply Power: for DC 0~90V Current Measurement Range: 0~20A Display Resolution: Voltage : 0.01V Current : 0.01A for 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 for Protection ): 0.01AH~9999AH OFT( Over-time for 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 for 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