Function: The 13-piece hollow plug with adjustable tip is compatible with the 5.5 x 2.1 mm universal power supply. It allows charging laptops from different outlets using a single power supply. The USB DC cable supports charging devices with input current from 1A to 3A. The DC plug is suitable for devices operating below 36V with a maximum current of 5A. Materials: Includes a USB 2.0 A to DC (24AWG) charging cable. The DC connector is made of high-quality stainless steel with gold plating. The USB interface is nickel-plated, providing wear resistance, durability, and antioxidant properties. Design: All DC sockets have standard dimensions of 5.5 x 2.1 mm. Specifications for each tip are provided in the product description. These connectors are designed to fit most laptops. Please verify compatibility before purchase. Compatibility: The USB DC cable is suitable for devices with a 5.5 x 2.1 mm DC input socket, such as routers, cameras, car recorders, desk lamps, TV boxes, speakers, LED displays, and USB fans. This DC connector kit works with laptops, external power supplies, and adapters. Compatible with brands including Sony, Dell, Toshiba, HP, ASUS, and Acer. Included Components: 13 hollow plugs including Type-C, Micro-USB, Mini USB, 5.5 x 2.1 mm, 5.5 x 2.5 mm, 5.5 x 1.7 mm, 4.8 x 1.7 mm, 4.0 x 1.35 mm, 4.0 x 1.7 mm, 3.5 x 1.35 mm, 3.0 x 1.1 mm, 2.5 x 0.7 mm, and square DC connector. Easy to use and practical for everyday needs. Additional Specifications: USB to DC power cable with a maximum current of 1000mA and voltage rating of 5V. Cable length: 100 cm (39.37 inches). DC tip polarity: inner positive, outer negative. Includes 10 DC plug connectors: 6.4x4.4mm, 6.3x3.0mm, 5.5x2.5mm, 5.5x2.1mm, 5.5x1.7mm, 4.8x1.7mm, 4.0x1.7mm, 3.5x1.35mm, Micro-USB, and LED terminal connector. Plug and play design ensures convenient use and portability. Multi-Purpose Cable: USB to DC power cable with 10 interchangeable connectors, compatible with a wide range of home appliances. Eliminates the need for multiple adapters when using various devices.