In my experience, this is the best no bark collar on the market. I have owned hounds since 1978 and have tried them all. Features include:
Non-electrical stimulation vibration (V) warning before the stimulation
7 intensity levels (1-7) for a wide variety of dispositions
Fits dogs as small as 10 lbs
3 LED color for battery indicator Green, Yellow, Red.
Automatic Level Intensity change based on barking behavior.
Fully waterproof
Charger included