About this item Rechargeable Backup Air Pump: This aquarium air pump can be used either plugged in or rechargeable, making it a daily and emergency air pump to cope with power outages, and is also perfect for use when fishing or transporting fish outdoors Adjustable Airflow: 1.7W air pump with single air outlet, 3W/5W air pump with dual air outlets; air volume can be adjusted in 4 stages to meet your different aeration needs Continuous & Intermittent modes: The aquarium pump has two modes of operation: continuous mode: continuously supplying oxygen to the aquarium; intermittent mode: supplying oxygen for 10 seconds and pausing for 10 seconds Compact & Portable: AQQA aquarium air pump features light weight, portable and space saving, with a hanging hook, it can be hang to any fish tank or bait bucket in seconds. With a full charge you can take it for outdoor fishing. Come with All Accessories: AQQA aquarium aerator pump comes with a complete set of accessories needed (air stone, air tube, check valve, a USB charging cable); You can the aerate you fish tank the minute you receive it.