It has an air blast to keep the food from getting all messed up.
It is a bit pricey (60 delivered) and had battery's,....Good luck trying to find something quality/accurate/worthy without the need for battery's.
going away for 10 days and you want a plug in? Will it reset if power outage? battery = no worry
Using it for over 3 years now...in fact, It is so reliable I sometimes forget it is there and have to fill it.
anyway..it is the only one I have liked. I have a beach place and go almost everyweekend. although it is not 10 days. I can look into teh clear food holder and smile knowing that power lose or what not, my fish are being fed.