Esky 500-feet Range Remote Dog Training Collar--Multi-Function Electronic Anti Barking Dog Collar with Vibration & Static Impulse & Whistle & LED Light to Make Your Dog Smart This multi-function(4 in 1) training collar is a combination of:Vibration + Static Impulse + 3-Level Whistle + LED Light The static impulse can quickly and effectively curb the improper behavior of the pet. Both the static impulse and warning functions are set with automatic stop. This is for not reprimanding the pet continuously. With the vibration induction power switch in the collar receiver, it will turn on and turn off automatically to save power. Water resistant Collar - Suitable for 20lbs-70lbs dogs.