The PetSafe PDT00-10603 Yard and Park Trainer has been proven safe, comfortable and effective for all pets over 8 pounds and at least six months old. The Yard and Park Dog Training Collar assists you in controlling your pet without a lead and at a range up to 400 yards. At the push of a button, the Remote Transmitter sends a signal, activating the Receiver Collar. Using the Remote Trainer consistently and correctly, many misbehaviors that your pet exhibits can be corrected or any basic obedience commands can be taught. It's durable yet light-weight collar is waterproof and adjustable to fit any dog. It has eight levels of correction and a low battery indicator. A complete, comprehensive training manual shows how to properly use The Yard and Park Remote Dog Training Collar to make training a fun and rewarding experience for both the pet and the pet owner. The Remote Trainer can be used to deter unwanted behavior such as digging, chewing on furniture, jumping on guests, or barking. Or it can be used for basic obedience training such as teaching the "come" command. PetSafe PDT00-10603 Yard and Park Trainer features: 400 Yard Range Waterproof Receiver and Transmitter Rechargeable Batteries Both Positive and Negative Tone Buttons 8 Levels of Stimulation Low Battery Indicator on the Receiver and Transmitter PetSafe Yard and Park Dog Training Collar includes: Rremote transmitter (3"L x 1.5"W x 1"D) Receiver collar (3/4"W x 9"-23"L with actual receiver unit measuring 2"L x 1 5/8"W x 1 1/8"D) Charging adapter Operating and training guide Rechargeable batteries Test light kit Lanyard