Two-Dog; Continuous and Nick Stimulation; 900 yard range; waterproof, rechargeable collar; water-resistant, disposable battery transmitter. The NEW Compact, Lightweight Micro-iDT Training Collar! D.T. Systems is proud to introduce the new Micro-iDT, a lightweight trainer that offers simple controls, but advanced features so that this unit can grow with your dog’s training needs. The rugged micro-sized collar unit and transmitter fit in the palm of your hand. The comfortable waterproof collar fits small to large dogs. The Micro-iDT Series represents the many technological advancements in the Electronic Dog Training World. It offers Maxx-Range™, the industry's only internal FM radio frequency antenna woven in the collar. With ocer 1/2 mile (900 yard) range, they are perfect for field or household use. The Micro-iDT Series collars feature Sixteen levels of stimulation intensity, with an easy 'no look' clicking stimulation dial. Easy one hand held operation allows for maximum control and safety.