Feature:
12V 24V DC Single QC3.0 USB Port Battery Voltmeter with Power ON OFF Switch
Note:
1.The "+" is to positive, and "-" to negative.
2. For vehicles, it's recommanded to get power from fuse box, while for the motorcycle, better connect to the wires of the key switch.
3. The led light will show up after the item is connected to the battery.

Specifications:
QC3.0 USB Charger Application:Charges all USB devices including Apple and Android
Input Voltage:12 - 24 VDC
Output Power:Single QC3.0 ( 5V - 3A / 9V - 2A / 12V - 1.5A ) with voltmeter display
Connections Input:6.35mm push-in flat blade connectors
Digital Voltmeter Color:Blue, red, green led digital voltmeter display
Installation:DC12V - 24V vehicles, car, motorcycle, bus, truck, boat, marine, rv, etc.
Weight: 28g