Input: AC 100~240V, 50/60Hz; Output: DC 3~36V Adjustable, Max 4A 144W; It can supply any voltage between 3~36V, such as 3V, 4V, 4.5V, 5V, 6V, 9V, 12V, 16V, 19V, 21V, 24V, 26V, 28V, 30V, 32V, 36V, and any current up to 4A, such as 300mA, 500mA, 1A, 1.5A, 2A, 2.5A, 3A, 3.5A, 4A. LED display shows the output voltage. If the current exceeds 4A, the power supply will shut down. Do not overload. 1. The knob allows smooth and precise voltage adjustment. 2. Includes an off switch to turn off the power without unplugging. 3. Comes with a polarity converter cable and test leads for broader device compatibility and expanded application. 4. Built-in multiple safety protection systems: automatic over-voltage, over-current, over-temperature, and short-circuit protection. Operates quietly and safely with no risk of spontaneous combustion, explosion, or fire hazard. Includes one 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 commonly used electronic devices. Easy wire connection for DIY projects. 6ft power cable for convenient use. The 144W all-in-one multipurpose AC/DC adapter is suitable for various 3~36V small household electronics such as LED strips, 3D printers, TV boxes, smart speakers, wireless routers, essential oil diffuser humidifiers, USB fans, WiFi cameras, USB hubs, hard disk enclosures, DC motors, DC pumps, digital photo frames, DVR/NVR surveillance systems, and more. For indoor use only. (Check DC jack size 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 to deliver high-quality, reliable, and safe power solutions. Plug Type: EU Plug.