Powerful type with an air flow rate of 2.3 liters/minute https://hapyson.com/products/air-pump/453/ I panicked and bought this in September when I went on a fishing trip for sweetfish and forgot my pump. I have used it for about 6 hours. There are minor scratches from use, but they are not noticeable in the photos. The operation is perfectly fine. All accessories are included, but there is no box.