These compact, waterproof (IPX7) and rugged devices have integrated stainless steel contact points optimized for all dog breeds and all coat lengths. For trainers who want to put an end to nuisance barking, the dog devices include our innovative, built-in BarkLimiter, which corrects unwanted barking through advanced bark correction technology. This feature works only with the Delta Sport handheld. The dog devices use long-lasting rechargeable lithium-ion batteries that last 3 months per charge. They are compatible with all Garmin 3/4" collar straps.