12V 1A power supply for CCTV router 5.5*2.1mm

Specification:
Input Voltage 100-240V
Output Voltage 12V DC
DC Connector Size: 5.5x2.1mm
Cable Length: Ultra Long 3 Meters
Color: Black
Plug Type: US Plug/EU plug

Voltage:
This power supply we sell is 12V DC. It take any input from 100V up to 220V AC, which is what comes out of your wall socket, and output 12V DC. 
This is what most digital devices such as LCD screens, DVD players, Hard Drives, Audio Gear, and most other digital devices use. 

Amperage:
Once you have confirmed that you need a 12 Volt power supply, you will need to find out how much power your device draws. This is called amperage. 
Next to the 12V in the specifications there will be another number followed by a capital "A" for Amps. You will need a power supply that can supply enough power for your device. 

Connector:
This power adapter adopts standard plug size 5.5x2.1MM. Most 12V DC devices use the standard tip.