Tri-Tronics Bark Limiter XS - $119.99

Five stimulation levels let you choose the right amount of gentle persuasion to control your dog's barking. Small, lightweight waterproof receiver on the collar is powered by a user-replaceable 3-volt lithium battery (included). LED indicates intensity level, which can be changed with the push of a button. Unit also features a bark odometer to help monitor your dog while you are gone. Interchangeable long and short contact points to match your dog's coat thickness. Receiver dimensions: 1.8" x 1" x 1". Weight: 4 oz. - $119.99