Innotek UltraSmart Contain and Train Quality and performance driven products for your pet Tested for safety and health Provide a better quality of living for your pet with Pet Safe In-ground pet fencing and remote training system for dogs 6 months or older Pocket-sized controller; 9 levels of stimulation, plus tone-only training 500 feet of wire and splice flags included; expandable to 25 acres Rechargeable waterproof receiver; collar fits neck sizes 8 to 24 inches Receiver measures 2-3/4 by 3/4 by 1-1/4 inches; transmitter measures 1-3/4 by 3/4 by 4-1/8 inches; limited lifetime warranty