Non-Shock Smart Dog Training Collar, Marsboy Rechargeable Pet Trainer Vibrating Collar with Smart Emitter for Small Dogs Only (No Remote Control Need) World Exclusive: The first smart training collar equipped with training emitter, get rid of remote control, keeping hands free to train dog. Smart Emitter: Put the emitter anywhere you want with radius 50cm / 100cm & 360 Degree adjustable detecting range to keep dog away from certain area. Smart Collar: It vibrates when dog come close to the electric fence zone, vibration will stop when away from the sticker. Totally no harm to dogs. Anti-Lost Function: Smart collar can help you to guide dog keep away from door when youre away; Call sticker is useful when naughty dog run away alone. Not Training but Guiding: Marsboy smart collar is not aim to train dog do certain things, but to guide their behavior, help them keep away from dangerous area and things.