Function: the 13 piece hollow plug with adjustable tip is a combination of the 5.5 x 2.1 mm universal supply. You can charge laptops from different outlets even if you only have a single supply. USB DC cable is used to charge 1A ~ 3A; the DC plug is suitable for voltages below 36V, maximum current 5A. Materials: it is equipped with a USB 2.0 A to DC (24AWG) charging cable. The DC connection is made of high quality stainless steel and is gold plated. The USB interface is -plated, wear-resistant, durable and antioxidant. Cut: All DC sockets have the standard dimensions: 5.5 x 2.1 mm. The parameters of each tip are all listed in the description. They are suitable for almost all laptops. Very full. Please check if you need this before purchasing. Compatibility: DC USB cable is suitable for devices with 5.5 x 2.1 mm DC socket, e.g. Router, camera, car recorder, desk lamp, TV box, speaker, LED display, USB fan, etc. This DC connection kit is with laptops, external supply and integrated transformer. For example, with , with , with , with , with , etc. 13 hollow plugs included: Type-C, -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, DC, easy to , family needs such a set. Type:Cable Adapter color:Black Material:Plastic + Metal Package Contents: 1 x USB to DC Cable 13 x Laptop Charger Adapter Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.