SB-168:
- Size: About 11x6.8x4.8cm/4.33x3.07x1.89inch.
- Power: 1W
- Voltage: DC-5V
- Pressure: 0.015Mpa
- Air Output: 3L/Min
- Outlet: Single Hole
- Battery capacity: 1100 mah.
- USB cable length: 100cm.
- Suitable for 30L fish tank.

SB-268:
- Size: About 11x7.8x4.8cm/4.33x3.07x1.89inch.
- Power: 2W.
- Voltage: DC-5V
- Pressure: 2*0.015Mpa
- Air Output: 2*3L/Min
- Outlet: Double Hole
- Battery capacity: 2600 mah.
- USB cable length: 100cm.
- Suitable for 30-100L fish tank.

SB-168:
1 x Oxygen Pump
1 x Hose
1 x Bubble Stone
1 x USB Cable
SB-268:
1 x Oxygen Pump
1 x Hose
2 x Bubble Stone
1 x USB Cable
Producing more bubble and increase more oxygen.
The mute pump is almost no sound and is suitable for the quiet environment to feed fish, such as living room, bedroom, outdoor fishing and so on.
With a small size, it is easy to carry around and suitable to use outdoors.
The oxygen pump is equipped with a USB interface.
Low power can save energy and it is more economical.