6v, 12v, 24v, 4.5 V Electric Micro Air Pump Booster. Features: In a 500ml Container the Highest Current is Less Than Load Current While the Air Pump is Powered with Rated Voltage. 3-4 Noise: Pump Body Underlay is 5 Cm Thick Sponge, Placed on the Noise Meter 30 Cm, Rated Voltage Under Inflation Pressure from 0 to 420mmHg the Measured Value is Less Than 60dB 3-5 Flow 2.8LPM 3-6 Maximum Pressure In Rated Voltage Voltage Causes Inflation Pressure from 0 to Stop the Booster of the Highest Pressure Value is Greater Than 900mmHg 3-7 Operation Temperature Range: The Temperature Have to Be Between 5 and 50 and Humidity Must is between 30and 80RH to Function the Pump Well. 3-8 Preservation Temperature Range: The Temperature Has to Be Between Negative 20and Positive 60 and Humidity Has to Be Between 30and 85 RH to Keep the Pump in a Good Condition. Specification: Structure: Diaphragm Pump Fuel: Electric Power: Electric Pressure: Low Pressure Standard or Nonstandard: Standard Theory: Vacuum Pump . We are an international seller, your order will be shipped from abroad so please allow the necessary time of minimum 14 working days for delivery right now depending on where you ship to, due to ongoing delays in postal deliveries globally.