SISO AL-02 Rechargeable AC/DC Air Pump, This air pump is ideally suited to supplying air pressure to under gravel and box filters, air stones, and protein skimmers that use ceramic air stones. Quiet to run – designed to withstand the test of time. Features Low noise system, pure air compressed. Special DC model, microcomputer control. Trim controller, control the airflow. High efficiency and extraordinary output Low power, low cost. Continuous operation and long life.
- When the electrical power chooses the ac, when it goes off, dc changes to ac the air pump is working
- It can last 12 hours
- Long life