Buy 1 Get 1 Free - Ellestfun Green Tear-Drop Designed Ultrasonic Aroma Diffuser 300ml - Normal Price $89
300ml Water Tank, Continuous Run for 8 Hours, Intermittent Run for 16 Hours, Auto Shut Off When Water Run Out
12m Warranty
*Complimentary 1 Bottle of 15ml Aroma Oil (While Stock Last)
Still overpriced at 2 for $89, there are a whole bunch of these devices that you can find much cheaper.
After purchasing some myself (from a different vendor @ 2 for $49) I've since found out that it's actually really easy to do yourself, the 'ultrasonic' fogger is ~$4 http://www.ebay.com.au/itm/171927293521?_trksid=p2057872.m27…
Then all you need to add is a fancy container and DC power supply.
Where does your website confirm this item is Ultrasonic?