FGN Dog Training Collar with Wireless Remote, Adjustable E Collar, Durable Water Proof Rechargeable Control Operation for Large, Medium and Small Dog

This FGN dog training collar is perfect for dog owner or dog trainer who is looking for the electronic training collar.The top-notch technology and the premium battery capacities allow you to get to know your pets and correct their behavioral issues within a short period. With the help of the cool and convenient Backlight LCD display of the transmitter, you can pick the best fitting level of stimulation for each of your dogs. 
3 steps for you to fit the collar properly:
Step 1:Choosing the appropriate length of contact points.
This is a critical stop and is often overlooked. If you don't have the proper length contact points, the collar won't work correctly. For smaller dogs, the short contact points should be used. For large dogs, or dogs with a heavier hair coat, you should use the longer contact points.
Step 2: Fit the collar to your dog.
The collar needs to be placed relatively high on the dog's neck,usually just a couple of inches below the ears. The collar should be pretty snug on the dog's neck, and it should not dangle. If the collar is too loose, the contact points will not be touching your dog, and it will not work. A good indicator that the collar is fit properly is if you can fit two fingers under the collar.
Step 3: brush coat and check skin daily.
When first using, you should check under the dog's neck to make sure there is no irritation. It is also a good idea to brush their coat and check their shin daily.