(1). [ Overview ] __ Power Supply(US plug) Size: 29x11x18mm. Cord Length: 3ft. Female Connector size: 5.5x2.1mm. (2). [ Input & Ouput ] __ 100-240V AC input 50/60HZ, DC 12V 1A output. (3). [ Wide Application ] __ It is perfect for most 12V CCTV Security Camera and DVR/NVR/HVR Recorder(analog,AHD,TVI,IP), widely use for Wireless Router,LED Strip Light,Audio/Video Player,Printer,Switch,Monitor and so on. (4). [ Protection & Certification ] __ Our ZOSI power adapter has 4 kinds protections:Over-voltage,Over-heating,Over-current,Short-circuiting Protection. Certified by CE（EMC+LVD）, RoHS, FCC, UL. (5). [ 20/7 Customer Support ] __ Free life-time Tech Support & Any problems, please just feel free to contact us, you can always rely on our 20/7 customer service.(Customer Support response within 20 hours everyday)