There was another complaint on this site that describes exactly what happens when you call - you can not get to a person and they charge you very many times for shipping if you order two units at 19.95, you are charged 7.95 twice - if you order 4, you are charged $7.95 4 times. it is like you are being charged 79% for shipping for each item you order - WOW - WHAT A RIP OFF - NOW IF YOU STILL WANT THIS DEVICE AND YOU ARE A GARDENER AND AGREE WITH THE PROCESS 1. USE A 5 GALLON BUCKET WITH A LID AND CUT A HOLE IN THE BOTTOM ABOUT AN INCH IN... read full review »