Omron NEC 801 Nebulizer - WhiteOverview The Omron NEC 801 compressor nebulizer incorporates Virtual Valve Technology (V. V. T) that enhances the delivery of medication. With this Virtual Valve Technology, the nebulizer is able to produce more aerosols of respirable size for you to inhale. This unique V. V. T design produces results in lesser parts of aerosol that could be lost and wasted, hence reducing medication wastage. Choose from a wide range of Nebulisers at the best prices