Features The ultra‑quiet design does not produce too much noise, and the safe low voltage is adopted to guarantee safety. The pump is small in size, light in weight, sturdy in structure, easy to install and maintain, and is an ideal substitute for the old pump. Built-in pressure switch and overflow valve to protect the pump from damage and control the normal operation of the pump. Made of engineering materials, it can withstand high temperature and corrosion, the rate can be 3L/min, and the service life is long. Suitable for gas pumping, sewage treatment, electroplating blasting, biogas tank aeration, tunnel ventilation, etc. Feature: 1. The ultra‑quiet design does not produce too much noise, and the safe low voltage is adopted to guarantee safety. 2. The pump is small in size, light in weight, sturdy in structure, easy to install and maintain, and is an ideal substitute for the old pump. 3. Built-in pressure switch and overflow valve to protect the pump from damage and control the normal operation of the pump. 4. Made of engineering materials, it can withstand high temperature and corrosion, the rate can be 3L/min, and the service life is long. 5. Suitable for gas pumping, sewage treatment, electroplating blasting, biogas tank aeration, tunnel ventilation, etc. Specification: Item Type: Micro Diaphragm Pump Model: VN2709PM Material: Engineering Plastic Power Supply Voltage: DC6V Power: 3W Flow Rate: 3L/min Negative Pressure: -50KPa Medium: Air Noise: <=60dB Package List: 3 x Micro Diaphragm Pump Package List 3 x Micro Diaphragm Pump