The Bark BOSS is perfect for small dogs with its compact and lightweight design, and easy to adjust quick snap collar buckle. Small and compact in design with an easy buckle collar to fit very small dogs. The DT Bark BOSS bark control collar handles all types of dog barking problems. It features 8 e-stim levels and a beeping warning tone with an easy turn dial. Uses 6V battery (INCLUDED). Features100% Waterproof (dog can wear while wet or in water)Compact, lightweight and waterproof, with easy snap-on adjustable collar strapTough Nylon Collar Strap adjustable from 7" to 27" for dogs approx. 5 lbs to 120 lbs8 user-programmable levels of harmless static stimulationTone only program (only a beeping warning tone will be emitted) when a no-stim option is neededBeeping tone warning followed by a fully selectable 8 levels of e-StimOn/Off dial on unit with numbered options for selecting the e-Stim levels makes it easy to select the proper level for correction6v battery includ...