Description Our Smallest Bark Collar: Comfortable, compact design ideal for breeds like chihuahuas, yorkies, dachshunds, and beagles Adjustable Fit for Small to Medium Breeds: Fits neck sizes from 4–15 inches for a secure, customizable fit and perfect for dogs weighing 8 pounds or more Long-Lasting Rechargeable Battery: Up to 7 days of continuous bark control per charge for consistent training results Accurate Bark Detection: Perfect Bark technology responds only to your dog’s bark, reducing false triggers from other pets or background noise Adaptive Correction Pattern: Variable Pulse technology alternates between 10 auto-adjusting static correction modes to prevent desensitization and maintain effectiveness Durable & Waterproof Design: Withstands rain, puddles and splashes for peaceful play in any weather Product Dimensions : 1.7 x 1 x 0.1 inches; 6.24 ounces Item model number : PBC00-18240 Date First Available : January 12, 2026 Manufacturer : PetSafe Brands Small dogs have big voices, and they deserve tech that’s tailored to their size. NanoBark 2.0 bark collar is built for dogs with neck sizes 4 to 15 inches and helps stop nuisance barking so you can enjoy a peaceful home together. The slim, low-profile bark collar features a snug new fit with an updated design for extra flex and durability. Delivering the minimum effective level of correction for max results, it only responds to your dog’s unique voice and tunes out the neighborhood noise. With 10 levels of auto-adjusting static correction, the bark collar helps prevent your dog from growing desensitized with patented Variable Pulse technology. The long-lasting battery stays charged for up to 7 days and the waterproof design means you can enjoy puddle play with ease.