Features:[Environment-friendly Solar Energy]The use of solar energy makes it environment-friendly, portable and easy to install with no need for wiring, no operating cost and maintenance free, and solar power is much safer for your kid.[Large Air Volume]Stable silent oxygen pump with less than 60 dB low noise and 1.4L/min air volume, suitable for 40-250L container.[Battery Backup]Built in a 3.7V 1800mAh 18650 lithium battery pack for storing energy, thus the oxygen pump working in the night as well.[Evenly Air Distribution]There are 3 working modes can meet your different demands, and two air flow outlets make the air distribution more even and pervasive.[Adjustable Angle]The solar panel angle can be adjusted to receive the sunlight most sufficiently. Perfect for bird bath, small pond, garden decoration, water circulation for oxygen, etc.Product Working mode: Pattern 1: high speed (green light normally on) working hours: 24 hours,flow: 1.3 L/min Pattern 2: low (blue light normally on) working hours: 48 hours,flow: 0.7 L/min Pattern 3: Low gear Open 10 seconds stop for 10 seconds (green and blue double color light normally on) working hours: 72 hours