Solar Aerator, Fishs Love It! Solar poweredEasy installationVery quiet during workingMaking bubbles all day and night Product Specification Item Type: Solar air pump/ Aerator/ BubblerMaterial: ABSSolar panel: 2.5W, PET laminatedBuilt-in battery: Li-ion 3.7V 1800mAHSound: less than 60dBMinimum air flow: 0.6L/minProduct working voltage range:3.0V-4.25VWorking time on fully charged battery: 20 hoursAir Hose Length: 3.54ftCord Length: 9.6ft2 Buttons on panel: ON/OFF, Mode2 Holes on pump: Air inlet(small), Air outlet(big) What you'll get: 1 x Solar panel with stake, 1 x Air pump, 1 x Connector 1 x Air hose, 2 x Air stones, 1 x User manual Please Attention: Package comes with 1 long air tube rather than 2 or 3 short ones. Please cut it into 3 pieces: A, B and C. Make sure: A is short; B and C are long. B and C have same length, they are used to connect with air stone. The Advantages of Mengshen Solar Aerator Solar poweredEasy to installLong cord make sure solar panel can reach out to sunny place3 Working Modes available: Strong Bubble/Gentle Bubble/Cycles On and OffVery quiet during workingIt runs all day and night, making bubbles even in low lightIncrease O2 levels in the pond, make pond clear and fishes more active Wide Use 3 Working Modes: Strong Bubble (Indicator light is green) Gentle Bubble (Indicator light is dark blue) Cycles On and Off: 10 seconds on/10 seconds off (Indicator light is light blue) With a built-in lithium battery, it can store energy in day to make sure the oxygen pump can work at night. It make bubbles all day and light, increase O2 levels in the pond, your fishes love it! This solar bubbler is great for pond, small pool, fountains, fish tank, aquariums and so on. How To Install? 1) Mount solar panel in a sunny place, 2) Connect black cord of solar panel with black cord of air pump, 3) Plug air tube of air stones in air outlet of pump, 4) Immerge 2 air stones into pond/small pool/fish tank, 5) Press power button on back of solar panel. Please Attention: The air tube maybe bent because of the weather and transportation. Please soak it in hot water for 3-6 minutes to straighten it. Troubleshooting Make sure solar panel is exposed under sunshine,Air pump can not be put into water,Make sure air inlet on air pump hasn't been blocked,Make sure the connection is firm between air pump and air tube, air line and Y connector, air tube and air stone,Please do not forget to turn on the power switch on the back of solar panel,Air stone can not be put in the place that is too deep, otherwise not enough power to push air that far.