Item Type: Automatic Dog Bark Collar Material: ABS Battery Type: Lithium Battery Size: Diameter: Approx. 6-35cm / 2.4-13.8in 1、CORRECTS DOG BEHAVIOR: Dog barking collar corrects dog behaviors such as aggression, peering in the wrong places, unnecessary barking, etc. 2、RECHARGEABLE: Automatic bark collar uses a high capacity lithium battery, which can be recharged repeatedly and can get to 60 days long standby time. 3、SCOPE OF APPLICATION: Waterproof dog barking collar is suitable for all dogs, the diameter can be as large as 35cm and as small as 6cm. 4、WATERPROOF DESIGN: Automatic dog barking collar is waterproof and can be used safely in all weather conditions without fear of wind or rain. 5、SOFT AND COMFORTABLE: Waterproof dog barking collar is soft and comfortable for your dog to wear and will not hurt your dogs neck.1. It is recommended to cut part of the long hair to ensure the efficiency of the product (for a small number of large dogs). 2. Please allow some error due to manual measurement.1 x Automatic Dog Bark Collar