Petrainer PET916N2 330 Yards Rechargeable and Waterproof Vibrating Collar, NO STATIC SHOCK Advanced RF 434Mhz Technology boosts range up to 330 yards for 2 dogs. Completely waterproof remote transmitter and collar receiver. Can control up to two collar receivers, includes two receivers An effective, painless and humane method of training your dog. Instead of static shock mode, 10 levels of vibration stimulation is much safer for training dogs Accurate stimulation for vibration with noticeable differences at every intensity level. 2 modes: vibration and beep Built-in high capacity lithium rechargeable batteries. Both transmitter and collar receiver can be charged at the same time White stenciling against an orange background, create an easy viewing experience for the user. Backlit LCD Displays ensure training can be completed no matter the light conditions