Alrolink 12 Volt 500mA Power Adapter Supply AC to DC 5.5mm x 2.1mm Plug 12v 0.5a Power Supply Wall Plug 4ft Cord for Security Cameras System CCTV Accessories

12V 0.5A 5.5*2.1mm AC Adapter Specifications: Input Voltage:AC 100V-240V Input Frequency:50-60Hz Efficiency:81% Input Plug:Optional Output Voltage:DC 12V Output Current:500mA Output Power:24W Ripple Wave/Noise:<1% Cable Length: 4ft Output Plug:5.5*2.1(compatible 5.5*2.5) Operating temperature:-10-45degree,10%-90%RH Storage temperature:-20-60degree,10%-90%RH Package Includes: 1xPower Adapter(12V 500mA) Why I choose it? ?UL/FCC approved,Energy-saving, protection against short circuit, over voltage, over current and internal overheating! ?High quality, safe and reliable, environmental protection shell! ?All products are tested rigorously!