Oled Display Dc 37 22V Usb 20 30 65W 3A Current Voltage Power Detector Tester Battery Voltmeter Ammeter Charger Doctor

Features : 1. Automatic calibration of current zero function After long-term use, due to aging of the device or changes in ambient temperature, small current measurement errors may increase. The solution is to hold down the button and the breathing light is on, and an automatic calibration current zero operation is performed. After entering the main interface, the first line displays the current voltage value, the current power and the current data group, and the second line displays the current current and the cumulative capacity respectively. 2. Overvoltage and undervoltage reminder function When the voltage is higher than 5.3V, it will be displayed on the screen and will flash continuously, indicating that the USB voltage is too high. When the voltage is lower than 4.7V, it will be displayed on the screen, and it will flash continuously, indicating that the voltage is too low, the flashing cannot be turned off, when the voltage is normal. The range disappears automatically. 3. Capac Lees meer over de Oled Display Dc 37 22V Usb 20 30 65W 3A Current Voltage Power Detector Tester Battery Voltmeter Ammeter Charger Doctor van huismerk in de productgroep tools