About this item
DC-DC 4.5-40V To 5V 2A USB Charger Step down Converter Voltmeter Module is connected to power, the voltage can be detected in real time.When you need the phone, IPAD, MP3 and other digital products charge, click the “Output Enable” button,then USB power indicator lights, USB output voltage 5.0V.When you need to turn off the voltmeter, click the “Low Power” button, then enter the ultra-low-power standby mode, USB output corresponding shutdown.
Wide input voltage, for car / battery car / motorcycle used for monitoring battery voltage; measure the voltage needed for a variety of occasions. The output current capability 5.0V/2A, enough to meet a variety of USB devices, voltage is very stable.
Note: This module default D + D- short, most of the cell phone charger is compatible, and set aside a variety of mobile phones identification resistor installation location, if you need to add the identification resistor, please connect D + D- wires cut,then added.