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, such as 3V, 4V, 4.5V, 5V, 6V, 9V, 12V, 16V, 19V, 21V, 24V, 26V, 28V, 30V, 32V, 36V, and currents up to 4A, including 300mA, 500mA, 1A, 1.5A, 2A, 2.5A, 3A, 3.5A, 4A. The LED display shows the output voltage. Exceeding 4A may damage the unit. Do not overload. Features: 1. Smoothly adjustable voltage knob. 2. Built-in power switch for easy on/off control without unplugging. 3. Includes a polarity converter cable and alligator clip test leads for broader device compatibility. 4. Integrated safety protections: automatic over-voltage, over-current, over-temperature, and short-circuit shutdown. Operates quietly with no risk of combustion, explosion, or fire hazard. Includes one 5.5x2.5mm connector 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 for DIY applications. 6ft power cord for convenient use. The 144W AC/DC adapter is suitable for various 3-36V indoor electronic devices such as LED strips, 3D printers, TV boxes, smart speakers, wireless routers, humidifiers, USB fans, Wi-Fi cameras, USB hubs, hard drive enclosures, DC motors, DC pumps, digital photo frames, DVR/NVR systems, and more. Confirm your devices DC jack size before use: compatible with 5.5x2.5mm and 5.5x2.1mm connectors. Package includes: 1 x 3-36V 144W universal AC/DC adapter 14 x DC connector tips 1 x reverse polarity converter 1 x alligator clip test lead 1 x male DC power pigtail cable Plug type: EU plug (suitable for use in Indonesia, Germany, France, Spain, Italy, and other regions with EU socket standards) Input voltage: AC 100-240V, 50/60Hz Color: Black Material: Plastic Note: Lighting and screen settings may cause slight color variations between the image and actual product. Measurement tolerance: 1-3cm.