The SportDOG YT-300 YardTrainer 300 Dog Remote Training Collar is a versatile and effective tool for training dogs of all sizes, including Labrador Retrievers. With a range of neck sizes from 5 to 22 inches, this collar offers customizable fit for your furry friend. The remote control allows for vibration or static correction, giving you precise control over your dog's behavior. The rechargeable battery ensures long-lasting use, and the Bluetooth connectivity allows for convenient smart home integration. With the YardTrainer YT-300, you can train your dog efficiently and effectively. This was an estate sale find. It has been cut opened and appears to be new but I?m not certain so I?m listing as used.