4-in-1 MultimeterThis digital DC voltmeter ammeter is used to measure voltage, current, electric energy and active power of electrical appliances. Has passed CCC, FCC, CE certification. [Measurement Range] Voltage Test Range: 6.5~100V DC, current test range: 0~20A, active power: 0~2kW, electric power test range: 0~9999kWh. Please do not exceed the nominal parameters. 20A only for For short loads, but not suitable for continuous operation. If the continuous output exceeds 15A, it is recommended to upgrade to the 50A version. More Functions Large LCD display with backlight; voltage alarm function; energy reset function; power off data storage; built-in shunt, no external shunt required. Wide ApplicationThis DC voltmeter is suitable for indoor use and cannot be used outdoors. Can be used to monitor batteries, solar systems, e-bike generators and other fields. The load cannot exceed the rated voltage and current. PackagePackage: 1*DC Multimeter, 1*User Manual. Noticed : Please connect according to the wiring diagram we provide. If you want to try another connection, please contact us first.Otherwise, incorrect connection may cause product burnout or malfunction. Product Description It has the function of measuring electrical parameters (voltage, current, active power, electrical energy). Voltage alarm function (over voltage alarm threshold, backlight and voltage flashing when alarming). Energy key reset function. Store data in case of power failure. Large LCD display (simultaneous display of voltage, current, active power and electricity) Backlight function. Backlight control Press this button to turn the backlight on or off. Save backlight status when power off. Reset power Press and hold for 5 seconds until Release the button after the number flashes and press the button again, the power value will be cleared and exit the reset flashing state. If you don't want to clear, press and hold 5 again Seconds until the number does not flash, indicating that the electric energy value has not been cleared, and exit the state voltage alarm Press and hold until the electric energy display area shows 'SET', release the button, the current high voltage alarm value is displayed in the set area. voltage, the current low voltage alarm value is displayed in the current box and the last digit starts flashing. Press the key to adjust the value.No operation within 3 seconds will automatically change the number, then press the key to adjust the value. Voltage alarm threshold setting range: 6.5V~99.9V. After setting, press and hold Press and hold until the screen displays "PASS". Learn More Wiring Diagram Notes: This module is suitable for indoor use, please do not use it outdoors. Applied load must not exceed rated voltage and current Wiring sequence cannot be wrong.