This collar will adjust it's stimulation to what is required to stop your dog barking. It comes with a  replaceable alkaline 6-volt battery. In normal use this should last from 3-6 months. The unit is weather proof but not 100% waterproof. See it here

This collar is rechargeable and 100% waterproof. It uses a rechargeable NiMH battery which provides a long life and no charging problems. It fits all dogs abut is especially suitable for small dogs. See it here

A built in detector picks up the vibration of the dog's vocal chords during barking. A slight static pulse is delivered to get your dog's attention. The pulse is short and designed to provide no real discomfort.
There are 7 levels of stimulation. When a dog first barks, it receives a level 1 stimulation followed by a time out. This gives the dog a chance to associate the bark with the stimulation. If the dog barks again the stimulation moves to the next level. After 5 minutes of bark free time the auto-set stimulation level shifts down the scale.

The Jetcare bark control collar contains a microphone. When you dog barks , a cold spry is released towards your dog's neck. The effect of this surprise is enough to interrupt your dog in it's undesirable behaviour. No more problems with the neighbourhood. See it here