4. Long press and lightly touch the button for 3 seconds to turn off the LED display, and lightly touch the button again to turn on the LED display Show; 2. Lightly touch the button to switch between measuring input or output voltage, and there is an indicator light showing which one is being measured Road voltage; 1. Equipped with a voltmeter display, with an error of ± 0.1V and a range of 0-40V. (Note: To the accuracy of the voltmeter, please that the input voltage is above 3V) 3. It has a power-off memory function and displays the last measured voltage value when powered on; 5. With wiring terminals, it can be easily used without a soldering iron, and the soldering wire connection points are retained;, Weight: 0.330693393 Pounds, Manufacturer: Xnuiasqe