The%20Ultra%20Min-e%202090%20was%20specifically%20designed%20for%20smaller%20dogs.%20WATERPROOF%2C%20lightweight%2C%20%26amp%3B%20compact%2C%20the%202090%20is%20extremely%20durable.%20The%20collar%20strap%20is%20easily%20adjustable%20and%20the%208%20levels%20of%20Gentle%20Touch%20e-Stim%20offer%20safe%20%26amp%3B%20effective%20bark%20control%20for%20all%20dogs.Features100%25%20WATERPROOF%20(dog%20can%20wear%20while%20wet)Very%20small%2C%20compact%2C%20and%20lightweight%20(less%20than%203%20ounces)Collar%20box%20measures%20(L%201.8%26quot%3B%20x%20W%201.25%26quot%3B%20x%20H%201.3%26quot%3B)Nylon%20Collar%20Strap%20FULLY%20adjustable%20from%205%26quot%3B%20to%2028%26quot%3B%20for%20dogs%20approx.%205%20lbs.%20to%20120%20lbs.8%20user-programmable%20levels%20of%20harmless%20e-Stim%20static%20stimulationMagnetic%20On%2FOff%20switch%20built%20into%20the%20collar%20with%20extra%20key%20chain%20magnet%20included6v%20battery%20included%20with%20unitAverage%20Battery%20Life%2C%202-3%20weeks%20depending%20on%20frequency%20of%20useIntelligent%20Vibration%20sensor%20only%20picks%20up%20vocal%20cord%20vibrations%20from%20your%20barking%20dogCollar%20will%20NOT%20activate%20from%20other%20loud%20noises%20or%20other%20barking%20dogsAutomatic%203-second%20safety%20delay%20to%20eliminate%20unnecessary%20corrections