Bull charging pile has three versions: standard, fast charging and wireless charging. The standard version supports 5V\/2.4A output, the fast charge version supports 9V\/2A output, and the wireless charge version supports 10W wireless charging. If you need fast charging, you can choose fast charging or wireless charging; If you only need regular charging, you can choose the standard version. From the point of view of cost performance, the standard edition is the most worth buying.