BH400R Rechargeable 2-in-1 Remote Trainer and Bark Control Collar 400m 1-2 DogsBARKAHOLICS BH400R Remote Training 2in1 Auto Bark Shock Collar 1 2 Dogs S M L 400m The BARKAHOLICS BH400R is the perfect choice for training up to two dogs. Featuring adjustable shock and vibration, a 400m range, IPX7 waterproof technology, and a rechargeable battery, it combines remote training and auto bark detection for effective and reliable use with any size dog. 1 100 adjustable stimulation levels, you can fine tune this e collars level to suit