Three operation modes speed, low speed, and interval modes optimize oxygen delivery for different aquatic needs. Suitable for tasks such as aquarium care or fish transport. Solar power The pump is powered by efficient solar panels, using sunlight to run without the need for additional energy sources. Portable and convenient design Compact and lightweight enough to hold in your hand. Includes a metal buckle for hassle transport and hanging options. Charging capacity 2600 mAh rechargeable battery supports both solar and USB charging, providing a reliable oxygen supply without interruptions. Key benefits Independent operation: solar charging reduces reliance on mains power and supports ongoing use. Flexible performance: three modes allow you to tailor oxygen delivery to the task at hand. Handheld portability: small, lightweight design with a metal buckle enables quick setup and hanging in various locations. Consistent oxygen supply: builtin battery ensures reliable performance during use, with multiple charging options. Use scenarios Inhouse aquarium care: maintain adequate oxygen levels during routine maintenance, water changes, or night cycles. Fish transport: ensure continuous oxygenation during transfer between containers or locations. Power outage or outdoor use: operate where power is unavailable, such as during travel, temporary outdoor setups, or emergencies.