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 current 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. Integrated power switch for easy on/off control without unplugging. 3. Includes a polarity converter cable and alligator clip test lead for compatibility with a wide range of devices, expanding application possibilities. 4. Built-in safety protections: automatic over-voltage, over-current, over-temperature, and short-circuit shutdown. Operates quietly and safely with no risk of spontaneous combustion, explosion, or fire hazard. The adapter comes with a 5.5x2.5mm connector tip and 14 commonly used interchangeable 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. Suitable for most common electronic devices. Easy wire connection via screw terminals, ideal for DIY applications. Includes a 6ft power cord for convenient use. This 144W multi-voltage AC/DC adapter is suitable for various 3~36V small electronics such as LED strips, 3D printers, TV boxes, smart speakers, wireless routers, essential oil diffusers, USB fans, Wi-Fi cameras, USB hubs, hard drive enclosures, DC motors, DC pumps, digital photo frames, DVR/NVR systems, and more. For indoor use only. Check device compatibility: 5.5x2.5mm jack (compatible with 5.5x2.1mm). 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 standard outlets) Voltage: AC 110V Color: Black Material: Plastic Note: Light reflection and display differences may cause slight color variation between the product image and actual item. Measurement tolerance: +/- 1-3cm.