【Difference between three types of lines】

5V pass-through: simple power cord, USB input is 5V, power DC plug output is 5V 

9V boost line: with boost components, the USB input 5V voltage is passed through the components, and the voltage is boosted to 9V voltage 0.8~1A  

12V pass-through: with a boost component, the USB input voltage of 5V is passed through the component, and the voltage is boosted to 12V voltage 0.8~1A  

Purchasing Guide:

1. Look at the voltage and current at the bottom of ADSL, router, and switch, the voltage is 5V selection 5V universal, is 9V choice 9V universal, is 12V choice 12V universal.

2. DC plug specifications: if the diameter is 5.5mm, choose the universal one; if the diameter is 3.5mm, please select the corresponding voltage and 3.5mm conversion head; (3.5MM plug is the same size as the mobile phone headphone plug)

3. Suitable for routers, switches, optical modem brands, as long as the voltage is the same, the power is not more than 10W products can be used.