Power Adapters
4. Output: DC 9V 2A 18W
5. Adapter connector size: 5.5mm x 2.5-2.1mm
6. Negative pole (-) on the inside and positive pole (+) on the outside of the adapter connector

8. Line length: about 90 cm

Output type: DC

Application: switch
Output voltage: 9V

Output current: 2A
DC plug: 18W, 5.5-2.5MM/2.1MM
Polarity: Internal negative, external positive