Feature: 1. Universal DC Connector: The DC power cable is equipped with a 5.5mm x 2.5mm DC plug, making it compatible with a wide range of devices. The outer diameter is 5.5mm, the inner diameter is 2.5mm, with a polarity of negative "-" on the outer and positive "+" on the inner. 2. Optimal Length: With a length of 93cm (37 inches), this DC power adapter provides adequate reach for your devices. Please confirm that this length meets your specific needs before purchase. 3. Comprehensive Safety Guarantee: Features multiple levels of protection including over temperature, short circuit, under voltage, over voltage, and over current protection, ensuring a safe operating environment for all connected devices. 4. Power Specifications: Input 50 to 60Hz and output DC 9V, 2.5A. For optimal performance, we recommend using the power supply at 80% of its maximum capacity to avoid overloading. 5. Versatile Applications: Suitable for LED billboards, LED displays, signage, light strips, security cameras, research equipment, LED lighting, industrial control devices, air purifiers, electronic refrigerators, mobile DVD, surveillance equipment, and more. Supports various household and portable electronics. Specification: Item Type: 9V 2.5A Power Adapter Material: ABS Output DC Port: Outer Diameter 5.5mm, Inner Diameter 2.5mm with card spring, compatible with 5.5 x 2.1mm Length: Approx. 93cm / 37in Scope of Application: Suitable for LED billboards, LED displays, luminous characters, light bars, strip modules, security, monitoring, military equipment, scientific research equipment, LED lighting, industrial control equipment, power equipment, instrumentation, semiconductor refrigeration and heating, air purifiers, electronic refrigerators, LCD display, LED lamps, security systems, computer case, small TV, 2.5 inch portable hard drive, mobile DVD, wireless video equipment, charging devices, MP3 or MP4, small desk lamp, router, game console, telephone, decorative lights, camera, monitoring equipment, controller, and other types of home or portable equipment. Package List: 1 x Power Adapter