SportDog FieldTrainer 400 (1071893)
SportDog FieldTrainer 400 is a remote training system for dogs with a range of up to 400 yards. Features 8 levels of correction and a lightweight collar that fits any dog. Please note that this product may only ship via UPS dimensional weight, which is above its actual weight.
I've had no problems with this. It works good inside its range. For the price, though, it should extend farther in my opinion.