Sobo mini ac/dc sb-4000 air pump features - 2.8watt with 2x3liter/min air output.
- air hose and air stones provided. - usb cable with adapter. - using lithium battery with smart battery protection unit.
- the battery will never discharge all its energy to ensure the battery unit is always at optimum condition
- usb chargeable means can charge using car usb port, power bank, etc.
- two modes, strong air output will last for 12 hours and intermittent air output will last for 25hours with full battery charge.
- super silent design with noise level less than 65db