Rechargeable Electronic Dog Fence Wired Containment System Receiver Collar For W227B

I bought this remote collar for my Sheltie and this is excellent to help my dog become a good boy. Initially I used the tone and vibration feature to train my dog. Then I set the vibration level to 20. I found out my dog didn’t respond me So I increased level of the vibration from 20 to 30. At last he is obedient now! Also there is another reason that I like this remote collar , the bright tracking light combined with TPU collar make it easy to find my dog whether its day or night!