Oxygen pump with two speeds and four different energy sources! You no longer need to use a different oxygenator for home and car or boat, since this pump can be used anywhere: at home it connects to a 220V socket with USB, the car is connected to a 12V USB plug, the boat is connected to the battery and when used away from power sources it operates with 3 AA batteries (not included). Included in the box is the 220V socket with USB, the 12V USB adapter and the boat's poles for the battery.