Features: 1.MULTIMETER: Digital multi-function meter can be used to test voltage, current, power, capacity for time and other physical information; current measurement range is 0~100A; voltage measurement range is 10~90V. 2.HALL SENSOR: voltage current meter adopts non-contact Hall sensors to test current, which is safety and convenient. Moreover, the instrument show date in colorful LCD display and its information is comprehensive and humane. 3.MEMORY FUNCTION: accumulated capacity will be stored when power off suddenly, you can clean it up or make it full. 4.PROTECTIVE FUNCTION: the voltmeter ammeter can be set parameters for overvoltage for protection, undervoltage for protection, over current for protection, over charging capacity for protection and for time for protection and so on. 5.APPLICATION: The volt ampere tester is quite suitable for monitoring the output voltage and current, as well as applications such as battery charge and discharge. Parameters: Current Measurement Range: 0~100 A Voltage Measurement Range: 10~90 V Display Resolution: 0.1A Current Precision: 3% 5 digits Voltage Precision: 2%5digits Measurement rate: 5time/second Open Holes (mm): 76.5*39.2(mm) Size: 794352(mm) for Protection Functions: OVP ( Over-voltage protections): 0.01V~90V OPP( Over-power protections ): 0.01W~9.99KW LOP( undervoltage for protection): 0.01V~90V OCP( Over-current protections ): 0.1~100A OAH( Over-charge for protection ): 0.01AH~9999AH OFT( Over-time for protection ): 1min~99hour59min Note:We have more detailed user manuals. If you need an electronic manual, please contact us. Package Includes: 1* Multifunctional Bidirectional Meter 1* Hall Sensor