I bought this for my new puppy. My other dog wears one all the time. I already had a base unit and a PURPLE turtle band that I had for my other dog. I had sewn on to my dog's collar months ago. When I adopted the new puppy I thought i would get a different color turtle and I ordered a green turtle so that each dog would have their own color turtle.
MAKE SURE IF YOU ARE ORDERING AN ADDITIONAL TURTLE FOR YOUR PET OR CHILD THAT YOU ORDER THE SAME COLOR THAT IS ON YOUR BASE UNIT OTHERWISE IT WILL NOT WORK!!!! I called the manufacturer to find out this information. IT IS NOT WRITTEN IN THE PRODUCT DESCRIPTION!!! MAKE SURE IF YOU ARE ORDERING A NEW EXTRA TURTLE THAT yOu ORDER THE SAME COLOR AS THE TURTLE ON YOUR BASE UNIT!!! So I had to pay to ship the green turtle back and then pay for shipping for the purple turtle!
I think this is a great product and the alarm does sound off loud and clear, sometime it gets wet when my dogs drink from their water bowl. I would rather have it be this sensitive to water than not!!! I have a pool in the backyard. Even though I watch my dogs closely, I feel safer with this added security!