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The product can be used to power the router/light cat through the USB interface of the charger.
Specifications:
Product interface: USB to DC 3.5mm/USB to DC 5.5mm
Interface size:
DC 3.5mm interface size: external diameter 3.5mm, internal diameter 1.35mm
DC 5.5mm interface size: external diameter 5.5mm, internal diameter 2.1mm
Plug level: internal positive and external negative
Three line differences:
5V direct connection: simple power cord, USB input 5V, power DC plug output 5V.
9V boost line: with the booster component, the voltage of the USB input 5V is increased to 9V, and current within 1A
12V direct connection: with the booster components, the voltage of the USB input 5V is increased to 12V, and current within 1A
Warm tips:
9V/12V boost line USB power supply is not connected to the USB port on the computer;
The current output of 9V/12V boost line is within 1A, and if your router/light cat current is larger than 1A, it cannot be used.

Included:
1 x USB Booster Table