The ultra-small size of this lightweight, waterproof collar unit fits all dogs. The collar adjusts from 6-1/
2" to 24". It has eight intensity levels, and the data memory system saves the last intensity setting used.
Powered by replaceable 6-volt lithium or alkaline batteries, the system delivers 1/2-second corrective
stimulation and has an automatic three-second safety delay. The vibration sensor in the digital system
picks up your dog's vocal cord vibrations when it barks, triggering a correction. And it will not respond
to extraneous noises or a dog's tags. The collar also has built-in magnetic on/off. An extra set of
medium electrodes and sensor prongs are included. Dimensions: 1-1/4" x 1" x 1-7/
8". Weight: 2 oz.