The Dogtra 1600NCP is designed for waterfowl hunters who require a unit suitable for mild-mannered to the most stubborn dogs. The new 1600NCP will not let you down, even under the harshest conditions. The e-linear Training System allows the necessary kind of electrical stimulation designed for rapidly moving, rambunctious dogs. The entire system is waterproof, and features a rugged collar with a metal buckle and leash loop. Long lasting NiMH rechargeable batteries provide over a week of use on a single charge, without the 'memory loss' problems of older NiCad batteries. The system includes a handy charger that charges both the receiver and transmitter at once from a standard wall outlet. A voltage converter is available for our international customers.