Mini Size with Buckle: This fish tank air pump is small, light weight and portable with a durable buckle. Suitable for outdoor fishing, small to medium size aquariums, fish tanks, ponds and so on. Ultra Quiet: This air pump aquarium runs with a super quiet but high efficient motor. Compared to the electromagnetic pumps, it makes no sounds at all. Won't disturb you when sleeping. Low Power Consumption: Power consumption of this usb oxygen pump is only 0.2W, long service life, high energy saving. If you plug it into a 10000MAH power sources, it can last for approx 50 hours and still works efficiently. USB Plug: The length of the USB cable is approx 4.9ft(1.5m), this mini air pump can run from any USB power resource. What You Can Get:1xAquarium Air Pump,1xUSB cable, 1x Air stone, 1xSilicone tube The size of the product is measured manually, and there will be an error of 2-3cm due to factors such as different measurement tools and measurement methods.