The GT-3, by Unleashed Technology, has a waterproof transmitter with three stimulation buttons, each with variations of 15 levels of electronic stimulation combined with vibration stimulation to encourage a dog to quickly begin and to perform a learned behavior.

The GT-3 has a half-mile range, waterproof transmitter, rechargeable and replaceable NiMH batteries, and an add-a-second dog collar capability. An operator's manual, training guide, and 30 day money-back guarantee are included.

Contact: Unleashed Technology; (866) 795-7387; unleashedtechnology.com