1. The micro- is driven by a micro-DC motor, which drives the internal mechanical eccentric eccentric motion, and the eccentric motion drives the internal reciprocating motion of the diaphragm.2. In this way, the fixed volume of air in the chamber is compreed (the compreed suction port is closed, and the exhaust port forms a slightly open positive preure), stretched (the compreed exhaust port is closed, and the negative preure suction port is opened). The preure difference, at which the preure (suction) enters the chamber and is discharged through the exhaust port.3. Micro-type vacuum s are mainly used in electrical products, industrial products, vacuum fresh-keeping machines, automobile exhaust reforming equipment, ysis and sampling, instrumentation and other fields. Completely maintenance-free, no oil , no pollution to the nsmiion medium, and can work continuously for a time.4. Small size, stable and reliable, hand-held suction instrument, low noise, low power consumption. Especially suitable for high negative environmental requirements.Working voltage: DC9V~14VRated voltage: DC 12VRated current: 500mARated power: 6WSuction: 5L/minVacuum degree: 65kpaMaximum preure: 120kpaNoise: Le than 60dbSuitable for 4.5-6mm tube. Mainly about hardne. The largest part of the outer diameter is 6.5mm.color:Bla+ silverMaterial:ABS+MetalPackage Contents:1 x vacuum suction Only the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.