3 Working Modes: There are 3 different working modes for you to adjust, high gear, low gear, low gear with 10 seconds on and 10 seconds off. You can choose the proper working modes according different needs.Compact and Portable: With compact size and light weight, it is convenient to carry around, especially for outdoor activities such as fishing.Durable Material: The solar air pump is made of durable ABS material and solar panel, which is safe and sturdy to use.Scopes of Applications: Widely used for adding oxygen into various aquariums, fish tank, pools, ponds, especially suitable for the power failure emergency oxygen increasing, the wild fish oxygen increasing and small amounts of aquatic transportation oxygen increasing.Warranty: SUNJULY 12 Month warranty means we've got you covered If you have anything you can do, please feel free to contact us.