Low to medium power; 400 yard range; nick and constant stimulation and vibrating page; waterproof collar/receiver; rechargeable The Dogtra 175 NCP is an entry-level companion dog trainer for small to medium breeds. This compact trainer has a 400-yard range, nick and constant stimulation modes along with Dogtra's patented non-stimulating pager function. Features a durable waterproof receiver, water-resistant transmitter, and rechargeable Ni-MH batteries.