The Bousnic Replacement Remote Dog Training Collar RS2A RS2B Transmitter is a durable and effective tool for training large dogs. Made from waterproof nylon material in a vibrant orange color, this transmitter features adjustable shock levels and is rechargeable for convenience. With a smart home protocol of Bluetooth, this remote control provides a reliable way to control your dog's behavior from a distance. The package includes the transmitter only, making it a perfect choice for those looking to replace or upgrade their current dog training collar.