Instructions for use: After power-on, the voltmeter digital display, if need to charge phone,Tablet PC, MP3 , please press the "Output Enable" button, then the USB power indicator lights, USB output 5.0V; if need to turn off the digital display, please press "low power" button, then enter the low-power standby mode, USB output shutdown. Voltmeter calibration method: 1, when the voltage meter display, press "Output Enable" button 2 seconds then release, voltmeter flashes. 2,Touch the "Output Enable" button, the voltage increases one unit, touch the "Low Power" button, reduce one voltage reduction unit(one unit is less than 0.1V ) 3, After the voltage adjustment is completed, please press the "Output Enable" button for 2 seconds then release, exit voltage calibration mode. if power off, parameter setting will automatically save. Uses: Car / motorcycle battery voltage monitoring, or other voltage measurements. USB Charger for Mobile phone, MP3, Tablet PC or other electronic products. Please Note: this module defaults to D+,D- shorted, compatible with most of the cell phone charging, if need to install identification resistor, such as IPhone please cut off the red line position Package include: 1x DC/DC Converter Digital Voltmeter Display USB Charger
Trustpilot
2 months ago
4 days ago
