Input: AC 100-240V, 50/60Hz; Output: DC 3-36V adjustable, up to 4A 144W. This power supply can provide any output voltage between 3V and 36V, including common voltages such as 3V, 4V, 4.5V, 5V, 6V, 9V, 12V, 16V, 19V, 21V, 24V, 26V, 28V, 30V, 32V, and 36V, with current support up to 4A. The LED display shows the output voltage. Exceeding 4A may damage the unit. Do not overload. Features: 1. Smooth voltage adjustment knob for precise control. 2. Integrated power switch allows turning off without unplugging. 3. Includes a polarity converter cable and alligator clip test leads for broader device compatibility. 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. Includes one 5.5x2.5mm DC 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 a wide range of electronic devices. Easy wire connection for DIY applications. 6-foot power cord for convenient use. The 144W AC/DC adapter is ideal 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, and DVR/NVR surveillance systems. For indoor use only. Verify your device’s 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 tips, 1 x reverse polarity converter, 1 x alligator clip test lead, 1 x male DC power pigtail cable. Designed for high quality and safety in power delivery. Plug Type: EU Plug (suitable for use in Indonesia, Germany, France, Spain, Italy, and other EU regions) Voltage: AC 110V Color: Black Material: Plastic Package Contents: 1 x Universal power supply set Note: Other items shown are not included. Note: Lighting and display differences may cause slight variations in color appearance. Measurement tolerance: +/- 1-3 cm.