1、DC Interface: Features a DC interface with an outer diameter of 5.5mm and an inner diameter of 2.5mm, utilizing a polarity of negative - on the outer and positive + on the inner, suitable for a variety of devices 2、Versatile Use: This power cable is suitable for charging and powering LED signboards, LED displays, industrial control equipment, comm devices, home appliances, mobile DVD, MP3, MP4, router, switcher, game console, and more 3、Comprehensive Guard: Equipped with five essential guards, over temperature, short circuit, under voltage, over voltage, and over current guard, ensuring secure and stable working for your electric devices 4、Compact and Portable: Boasting a small and lightweight construction, this power supply adapter makes it easy to carry around for daily use or during travels, fitting seamlessly into your luggage or backpack 5、Wide Compatibility: Specifically crafted to serve as a charging solution for electric equipment and audible system, this 13.5V 2A power adapter with a 5.5x2.5mm DC port ensures efficient power delivery to your needs Item Type: Power Supply Adapter Product Material: ABS Output DC Interface: Outer Diameter 5.5mm, Inner Diameter 2.5mm, with circlip, compatible with 5.5x2.1mm Cable Length: Approx. 93cm / 36.6in Application: LED signboard, LED display, luminous word, lamp module, monitoring, scientific research equipment, LED light fixture, industrial control equipment, comm equipment, power equipment, instrumentation, semiconductor cooling and heating, air purifier, electronic refrigerator, LCD, audible visual products, security, computer chassis, small TV, 2.5 inch mobile hard disk, mobile DVD, charging equipment, MP3 MP4, small desk lamp, router, switcher, game console, color light, camera, controller digital and other home or portable equipment. 1 x Supply Adapter