This Receiver Collar has 4 levels of static stimulation and a tone with vibration mode to alert your pet with a beep. Over Stimulation Protection stops the stimulation after 30 seconds. Run Through Prevention increases static stimulation if your pet tries to run through the boundary zone. It includes waterproof nylon collar with low battery indicator, batteries, short and long probes for varying fur length. It is compatible with PetSafe In-Ground Fence systems and can be used to add a new dog or to replace your current collar. This collar is for dogs 3.6kg & up and fits neck sizes 15-71cm.