Usage Tips: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, will not disturb your quiet life. Ultra-long battery life, usually charge at home, 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 will be quadrupled. Due to different product batches, the appearance and accessories may vary, which will 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.