【Junk Item】 The pump does not work. Recommended for those who can repair it. * It can be used by connecting to a solar panel or by the following method. This "Solar TYN-ZYB Air Pump" has the following specifications: • Operating power: DC5V / 1A • USB charging compatible It is a type that can be charged with a USB cable.  ⸻ * When used by connecting to a power source How to use If you want to use it with a household outlet, do the following: 1. Connect the **USB cable (included)** to the air pump. 2. Plug the USB into an AC adapter (USB charger). 3. Plug the AC adapter into the outlet. In other words, Outlet → AC adapter → USB cable → Air pump This is how it works. ⸻ Precautions (Important) • Use a USB adapter of 5V / 1A or higher. • Smartphone USB chargers are OK (most are 5V). • Absolutely do not use adapters such as 12V.