DUAL Pipes BH 310 Micro AIR Pumps DC 3.7-4V  Air Pump 

DC 3V.7-4V  Mini BH310 Vacuum Air Pump Motor can use it Micro Blood Pressure Monitor Oxygen Inflatable Air Pump. This product has stable and reliable performance, Small, hand-held instrument for pump-priming, low noise, low power consumption. Especially suitable for high environmental requirements. excellent quality and long service life. Ideal for provide oxygen for aquarium or other project. This pump may have a little noise, you can consider use a lower voltage, when the voltage is 3.7V-4V the air pump still work perfectly, and the sound will be acceptable.

• Product Name: DC Mini Vacuum Air Pump Motor
• Motor Model: 310
• Pressure: 0.08Mpa
• Air Flow Rate: 2 L / Min
• Air Vacuum Rate: 2 L / Min
• Rated Voltage: DC 3.7-4V;
• Size: Diameter: 27mm
• Length: 47mm
• Outlet for Pipe: 4mm
• Weight: 50gm

Features

• Stable and reliable performance.
• Low noise, high speed, high efficiency, low resistance.
• Excellent quality and long service life
• Suitable for 4mm/0.16inch Soft pipe
• Widely used for aquarium tank oxygen circulate, DIY projects etc…