This system assists you in controlling your pet without a leash in a range up to 400 yards. The transmitter is waterproof and provides 8 levels of stimulation or the option of training your pet with positive and negative tone. Used consistantly and correctly, many misbehaviors may be corrected or any basic obedience may be taught. Collar and transmitter are rechargeable. Kit includes: a handheld transmitter, receiver collar, charging adapter, test light kit, operating and training guide, lanyard and warranty card. Safe, comfortable and effective for all pets greater than 8 lbs. and at least 6 months old. Non-returnable 3 days after receipt.