Rechargeable Bark Control Device Waterproof Anti-Bark Collar Bark Detection (Blue) Features: With 7-level sensitivity adjustment, it is a modification effective behavioral tool that will help you train your dog to bark less. Can be easily charged with the USB cable. It’s smaller, lighter and more comfortable for pets. dogs. Whether your dog is an all-dog or a large dog, our adjustable dog bark collar can fit perfectly. The collar is waterproof, no worries to use it even on rainy days. Specification: Condition: 100% Brand New Material: Plastic + Nylon < p>Size: about 6.743cm/2.641.571.18in Battery: Built-in 300mA lithium battery Charging method: USB charging Adjustable diameter range: 6-36 cm Voltage: 5 V DC Pet size: to All sizes Weight: 78g Blue color Package list: 1 dog training collar. 1USB cable 1manual Note: If the dog’s hair is too long, it is recommended to cut it short so as not to affect the vibration of the product. Please allow 1-3cm error due to manual measurement