Feature: Dual ports can charge two devices while producing oxygen, saving time. Four-bar power indicator light, intuitive display of power, at a glance. The fuselage is designed with rounded corners, which fits the curvature of the hand and is comfortable to grip. Strong light flashlight, more convenient to use at night. The weight is only 170g, easy to carry, and the metal suspension buckle is easy to clip in the fishing box or fish tank. Specification: Name: Mobile oxygen flushing pump Model: FK177 Size: Approximately 14x6x2.2cm/5.51x2.36x0.87in Weight: about 170g Gross weight: 220g Battery: 3000mAh Output: 5V -2.1A 5V -1A Hose length: about 70cm/27.56in Function: It can be flushed with oxygen to facilitate the survival of fish, with light for lighting, built-in lithium battery can be for mobile phones, with USB port Instructions: Main power switch (click once to turn on the charging function, click again to turn on the flashlight function) Oxygen pump switch (after the main power switch is turned on, touch it to turn on the oxygen pump switch) Color: White Material: ABS Package Contents: 1X USB cable 1X Clear hose 1x Air Stone 1x Air 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.