Strong air pressure, sufficient oxygen, easy to use. Ultra-long battery life of 70 hours, no longer worry about fish lack of oxygen when fishing outdoors. Bedroom-level quietness of about 28 decibels, not disturb your quiet life. Ultra-long battery life, usually charge , just use an ordinary USB charger. If you go out fishing or long-distance portation, use a 10000 mAh power bank to charge, and the battery life be quadrupled. Due to different product batches, the appearance and accessories , which not affect the use Colour:As Shown Material:Plastics + Electronics Package Contents: 1 set x Rechargeable oxygen pump Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.