Function: The 13-piece hollow plug set 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 requiring 1A to 3A; the DC plug is suitable for voltages under 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 and gold-plated for enhanced conductivity. The USB interface is nickel-plated, providing wear resistance, durability, and antioxidant properties. Design: All DC sockets feature standard dimensions of 5.5 x 2.1 mm. Specifications for each tip are provided in the product details. This set is designed to be compatible with a wide range of laptops. Please verify compatibility before purchase. Compatibility: The USB DC cable works with devices featuring a 5.5 x 2.1 mm DC input, such as routers, cameras, car recorders, desk lamps, TV boxes, speakers, LED displays, and USB fans. This DC connector kit is suitable for use with laptops, external power supplies, and integrated transformers. Compatible with various brands including Sony, Dell, Toshiba, HP, ASUS, and Acer. Included Components: 13 hollow plugs – 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 ideal for home use. USB to DC Power Cable: Maximum current 1000mA, voltage rating 5V. Cord length: 100cm (39.37 inches). DC tip polarity: inner positive, outer negative. Additional Set: 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 easy setup and portability. Multi-Purpose Cable: USB to DC power cable with 10 interchangeable connectors, making it suitable for a wide variety of household electronics. Eliminates the need for multiple adapters when operating different devices. Universal Use