FGN Exclusive Rechargeable Waterproof Training Collar for Dogs&ndash;2 High Quality Durable Wireless Collars for Medium and Large Dogs&ndash;shocks, Vibrations, Light & Safe Beeps &ndash; Remote Control Operations ? SUPERIOR RF RANGE ? The latest technology used in this RF training collar for dogs uses a powerful 434 MHz frequency to transmit signals, which is capable of covering a 330-yard radius without any difficulty. Let your canine buddies have some space while been under your supervision. ? TRAINTWO CANINES WITH ONE REMOTE CONTROLLER AT THE SAME TIME ? The remote controller and the two electronic dog collars allow you to train two dogs at the same time. Ideal for professional dog trainers. Earn more money in less time! ? SUPER EASY CONTROL MECHANISM ? The hi-tech remote controller features separate buttons for different functions and has four modes: static shock, vibration, beep and light. The 100 levels of corrections of static shock and vibration allow you to pick the best parameters for each dog based on there size, personality and obedience level. ? RECHARGEABLE AND WATERPROOF ? The devices are 100% waterproof. Let your dogs wander wherever they want and have fun, without ruining your training devices. Rain, bodies of water, dew or even a storm cannot stop you from training and having fun with your doggies. The rechargeable batteries of the device make this a cost effective and long-term investment. ? ULTRA FAST SIGNAL TRANSMISSION ? Signal transmission between an electronic dog collar and transmitter takes just 10 seconds! No more yelling and running behind, to train your dogs. With a single button press, you can tame and train your wild canine friends even when they are scampering all over the place!