Usable to both adults and child.MMD approximately 5 micrometer.Nebulizer rate : 0.4 milliliter per minute (without cap).Contains: Compressor, nebulizer kit, air tubes, 5 pieces replacement filters, mouth piece, adult mask, child mask, instruction manual and carrying bag.Power consumption: 138VA and 1 year manufacturer's warranty from the date of purchase.3 years extended brand warranty from date of purchase.T&C: To claim warranty, original invoice is mandatory