The 18w adapter is a special power plug for use with high speed chargers and high powered devices, such as a UV light cleanser. It is compatible with all standard USB cables (USB-A).
The 18w adapter is recommended for our Sanitisers and is also required for high powered devices and high speed/fast charging. You may already have a USB plug with the correct specifications (5V/3A or 9V/2A) as they now come as standard with more recent phones (such as iPhone 11 and Samsung Galaxy Note 10 models). If you have an older USB plug, please check the specifications to be sure that your USB plug is suitable for high powered devices. Older model iPhone plugs are generally 5V/1A and are not powerful enough for a UV Sanitiser.