Dog Training Collar with Waterproof Rechargeable Remote

The material of the control and receivers is high quality. I had no problem setting them up for use and my dogs respond to them. I try to use sound and vibrate, but have not had to raise the "shock" above 2 (it goes to 15). The unit is easy to charge. It is also easy to use both collars at the same time.I would not use the collars as primary collars. They appear to serve more as a way to secure the training receivers around your dog's neck.