NanoBark Rechargeable Bark Collar for Small Dogs Fits Neck Sizes 6-13 inches by PetSafe - New/Sealed New/Unused/Sealed in Package MSRP $109.99 Features: - World's Smallest Bark Collar - the size and weight of your favorite smartwatch - 10 Levels of Static Stimulation - Waterproof - Comfortable - Low-Profile design - Rechargeable Lithium-ion battery - provides up to 40 hours of battery life depending on your dog's barking habits - Weighs 41 oz Included: - NanoBark Collar - USB charging cable - Quick Start Guide - Color: Black - Materials: Plastic, Nylon, Metal Adapts To Your Dog's Bark: NanoBark uses Perfect Bark tech to learn your dog's vocal pattern and automatically adjusts its stimulus correction for your dog's personality and barking habits Noticeable Results in Just 2 Weeks: NanoBark helps keep the peace, even if your small dog has a big voice Non-smoking household Fast shipping