With a range up to 1,000 yards, the Radio Systems PDT00-13625 Elite Big Dog Remote Trainer is designed to train your dog. Suitable for dogs weighing 40 pounds and above, the collar delivers a safe and gentle static correction which then alerts your dog. The receiver collar is durable and waterproof. On the tone-mode, you can catch your dog's attention with a beep. This trainer system also features 15 levels of static correction levels and an instant boost button.