Input: AC 100~240V, 50/60Hz; Output: DC 3~36V Adjustable, Max 4A 144W; This power supply can provide any voltage between 3V and 36V, including 3V, 4V, 4.5V, 5V, 6V, 9V, 12V, 16V, 19V, 21V, 24V, 26V, 28V, 30V, 32V, 36V, and current up to 4A, such as 300mA, 500mA, 1A, 1.5A, 2A, 2.5A, 3A, 3.5A, 4A. The LED display shows the output voltage. If the current exceeds 4A, the power supply will shut down automatically. Do not overload. Features: 1. Smooth voltage adjustment via rotary knob. 2. Integrated power switch allows turning off without unplugging. 3. Includes polarity converter cable and test leads for broader device compatibility and expanded application range. 4. Built-in safety protections: automatic over-voltage, over-current, over-temperature, and short-circuit shutdown. Operates quietly with no risk of spontaneous combustion, explosion, or fire hazard. The adapter comes with a 5.5x2.5mm tip and 14 commonly used DC tips: 6.5x4.4mm+Pin, 5.5x2.1mm, 5.5x3.0mm+Pin, 5.0x2.5mm, 6.3x3.0mm, 5.5x1.7mm, 4.8x1.7mm, 4.0x1.7mm, 3.5x1.35mm, 3.0x1.1mm, 2.5x0.7mm, Micro-USB, Type-C, and DC terminal connector. Compatible with most common electronic devices. Easy wire connection via screw terminals, ideal for DIY projects. Includes a 6ft power cable for convenient use. This 144W all-in-one AC/DC adapter is suitable for various 3~36V household electronics such as LED strips, 3D printers, TV boxes, smart speakers, wireless routers, essential oil diffusers, USB fans, Wi-Fi cameras, USB hubs, hard disk enclosures, DC motors, DC pumps, digital photo frames, DVR/NVR surveillance systems, and more. For indoor use only. (Check device DC jack before purchase: 5.5x2.5mm; compatible with 5.5x2.1mm.) Package includes: 1 x 3~36V 144W universal AC/DC adapter, 14 x DC tips, 1 x reverse polarity converter, 1 x alligator clip test lead, 1 x male DC power pigtail cable. Designed for premium quality and safety. Plug Type: EU Plug.