Features:1. Multimeter: The digital multi-function meter can be used to test voltage, current, power, capacitance time and other physical information; The current measuring range is 0 - 100A; the voltage measurement range is 10 - 90V.2. Hall sensor: The current voltage meter adopts non-contact hall sensor to test the current, which is safe and convenient. What's more, the device show the date in the color LCD display and its information is comprehensive and humane.3. Memory function: the accumulated capacity will be saved when the power is suddenly turned off, you can clean it or fill it.4. Protection function: the voltmeter ammeter can set the parameters of surge protection, undervoltage protection, overcurrent protection, over charge protection and time protection and so on.5. Application: The volt ampere tester is suitable for monitoring output voltage and current, as well as applications such as battery charging and discharging. Parameters:Current Measurement Range: 0 - 100 A Voltage Measurement Range: 10 - 90 VRdisplay Resolution: 0.1AAnth Precision: 3% 5 DigitsVoltage Accuracy: 2% 5 DigitsMeasurement Speed: 5 times/secondOpen Holes(mm): 76.5*39.2(mm)Size: 79 43 52(mm)Protection Features:OVP (Surge Protection): 0.01V - 90VOPP (Over Power Protection): 0.01W - 9.99kwLOP (Undervoltage Protection): 0.01V - 90VOCP (Over Current Protection): 0.1 - 100AOAH (Over Voltage Protection): 0.01V - 90VOCP (Over Current Protection): 0.1 - 100AOAH (Over Voltage Protection): 0.01V - 90VOPP (Over Current Protection): 0.1 - 100AOAH (Over Voltage Protection): 0.01V - 90VOPP (Over Current Protection): 0.1 - 100AOAH (Over Voltage Protection): 0.01V - 90VOPP (Over Power Protection): 0.01W - 9.99kwLOP (Over Voltage Protection): 0.01V - 90VOCP (Over Current Protection): 0.1 - 100AOAH (Over Current Protection) Overcharge): 0.01Ah - 9999AHOFT (Over Time Protection): 1min - 99h 59minNote: We have more detailed user manuals. If you need an electronic manual, please follow . Package Included:1*Multi-function Bi-directional Meter1*Hall Sensor