Remote Control: The remote control can be used to control the collar within a maximum range of 800m during outdoor activities,The range will vary depending on terrain, weather, vegetation, as well as transmission of light. #39;other radio devices. Four modes: This collar contains four modes of electric shock, vibration, buzzer and light, and each mode can be adjusted in level. Different brightness can make it easier to find the dog’s track at night. Waterproof collar: 100% waterproof collar, which is suitable for rain or snow, splashing, and contact activities with water. But if the dog wants to swim, please remove the collar first to ensure its service life Control 3 Collars At The Same Time:The dog vibration collar remote control can control up to 3 collars, so 3 dogs at the same time.