[Perfect Fit for Small Dogs: Lightweight dog bark collar for small dogs and puppies with an adjustable strap (6 - 20 inches) ensuring a comfortable fit for your furry friend Safe & Effective Training: Our humane barking collar combines safe sound and vibration with a powerful motor that offers 4 distinct vibration levels for effective yet gentle training Long-Lasting & Weatherproof: Enjoy up to 30 days of uninterrupted battery life and an IP87 waterproof rating. Our small bark collar is perfect for all indoor and outdoor activities "No More False Triggering: The vibrating dog collar has technology featuring a smart microphone that accurately detects your dogs unique bark avoiding false triggers and effective bark control" "Compatible with All Coat Types: No need to trim your dogs neck hair as shock-free anti bark collar for small dogs providing a reliable works on dogs with various coat lengths across all breeds"]