Features: Brand new and high quality This fish tank air pumps is small, light weight and portable. Suitable for outdoor fishing, small to medium size aquariums, fish tanks and so on. Our air pumps is super compact, super quiet, light weight and long service life. Compared to the electromagnetic pumps, it makes no sounds at all. Will not disturb you when sleeping. Necessary fishing product, which can adjust the amount of oxygen and prevent fish from dying of hypoxia. USB power supply, which can be powered by mobile power supply and USB charger. It can be used indoors and outdoors, and the oxygen pump is necessary for fishing enthusiasts and fish sellers. Specifications: Material:Plastic Specification: Single Head/Double Head Type:Without Switches/With Swtiches Tube Length:Approx.1m/39.37inches Package Includes: 1 Set USB Air Pumps note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.