This device helps pumps oxygen into the aquarium. But Unlike the electrical powered it uses the normal large tiger batteries - one or two ateries can power it.
Installation is easy: Fasten an end of a hose to the pump and the other end of the hose to the airstone and place the air stone inside the aqurium. Then turn on.
This item might not come with a shrt 6 inches hose and an Airstone. You can measure your aquarium and order for a hose lenght here on rehmie.com.ng for what is long enough for your aquarium.
RS Electrical Portable Battery Air Pump R-212
Specifications: Voltage: 3V
Noise: 25dB (A)
Dimensions: 140 * 75 * 40 MM Waterproof Dry pump being prepared, plus two on the 1st battery power can still play for your baby fish of oxygen.
Dimension (L x W x H) 14 x 5 x 4 Centimetre
Weight 0.3 Kilogram