QBM DC 3V-6V Transparent Air Pump DIY Oxygen Pump for Fish Tank Aquarium Diaphragm Pump DIY Mini air Pump 12v

9v DC Mini Air Pump for Multiple Applications.
Sphygmomanometer air pump, used in medicine multiple Applications.
Best for DIY Kit Fish farming for oxygen supply; using a mobile phone charging head or a 6-volt power supply, the noise is large, but the gas volume is large, and it can be used for oxygen fishing in the wild; mute, it is recommended to use DC 3 volts, which reduces the gas volume and also reduces the noise. and Experiments.
Completely maintenance-free, and no oil pump, do not pollute the transmission medium.
Small, stable and reliable, hand-held instrument for pump-priming, low noise, low power consumption. Especially suitable for high environmental requirements.