The V series device has dimensions of 337 x 390 x 620 mm. The V3 model weighs 21 kg while the V5 and V8 models weigh 24 kg. They offer a purity rate of ≥90%. The purity rate (l/min) is 1-5L and the outlet pressure is 40-80 KPA. The V3 model has a low power consumption of 350W, while the V5 and V8 models have low power consumptions of 480W. Optional alarms signal the events of power failure, low purity and overheating.