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. Built-in power switch for easy on/off control without unplugging. 3. Includes polarity converter cable and alligator clip test leads for wider device compatibility. 4. Integrated safety protections: over-voltage, over-current, over-temperature, and short-circuit protection. 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. Suitable for most common electronic devices. Easy wire connection for DIY applications. 6ft power cord for flexible placement. The 144W AC/DC adapter is ideal for indoor use with various 3~36V devices 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. Confirm your devices DC jack size before use: compatible with 5.5x2.5mm and 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 pigtail cable. Designed for high quality and safety. Plug Type: EU Plug (suitable for use in Indonesia, Germany, France, Spain, Italy, etc.) Voltage: AC 110V Color: Black Material: Plastic Package Contents: 1 x Universal Power Supply 14 x DC Tips 1 x Reverse Polarity Converter 1 x Alligator Clip Test Lead 1 x Male DC Power Pigtail Cable Note: Light reflection and screen settings may cause slight color variation between image and actual item. Measurement tolerance: +/- 1-3cm.