IiDrive is what I was sent by the med supply company through insurance but wasn’t cutting it for me for twice a day nebulizing. I purchased the ombra out of pocket along with the Aeroclipse cups and the Arobika. Depending where you purchase an Rx may be required. I also have the Pari Trek as a portable device. Both compressors were under $100 each although if you want the battery pack for the Pari Trek the price does double.