Features: This is just a conversion device, you need to provide the correct power output device, your computer device can work normally. This adapter is plastic material to provide more efficient heat radiation, so you don’for t have to worry it will hot-up quickly. For square interfaced to Type C USB C power adapter charging adapter Output: 45W (5V3A, 9V3A, 12V2A, 15V2A, 20V2.25A 5 voltages ranges automatically adjusted) Small size, easy to carry,perfect for traveling, school teaching. Function: Used for aging test, the square port is for output(connect laptop), Type C for input port, can not insert reverse. Note: This product can not be used for phone, and can only be used for computer with PD5W port, otherwise item can not be charging. Please note this point before purchasing Specifications: Size : approx 5.1x2x1cm/ 2.0x0.79x0.39in Input port: Type C. Input Voltages: 10.5v-32v Output Power: 45W Output port: Large Square port Package Includes: 1 PC x Adapter note: If the port is reversed, the product will not work properly. Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.