Aetertek AT-218C Submersible Remote 1 Dog Training Shock Collar With LCD display Submersible (100% waterproof) dog trainer, can be immersed in water when swim As 1 or 2 dog training shock collar, this list is for 1 dogs training system. Respond quickly, and can keep working until you release the function button Vibrate, 0-10 level of Shock, Beep. use the most advanced design, electromagnetic induction switch solution, on the power ON/OFF switch to ensure unlimited accurate switch, more convenient and reliable Remote control to 600yards (approx. 550 meters) for all dog size from 15-150lbs. Use the 915 MHz frequency segment. CE,ROHS,FCC Approved. 1 Year warranty. receivers using 5.0MM pore size on charging port which can be charged repeatedly and never deformation and worn, 100% Safety and reliability.