HUMANE, HARMLESS, EFFECTIVE: It is not definitely about shocking and exerting pain to train your furry friend. The progressive sound and vibration stimulus with 7 levels sensitivity adjustment will help your dog understand that barking triggers the vibration and the beeping sound. Your dog is quickly and easily taught that it just needs to stop barking to get rid of the irritating sound and vibration alike. INTELLIGENT CHIP AND UPGRADE DESIGN VERSION: Unlike cheaply made and useless training collars, this great anti-bark collar has a tiny CPU built onto a single chip and put into electric devices to control how they function. Only your dog's sound combined with the vibration will trigger the smart sensors which are not affected by another dogs' barking. The sleep mode allows the collar to automatically stop working to SAVE BATTERY lifespan in the case of not being used. FLEXIBLE SIZES FOR YOUR FURRY BABY: Whether your dog is a pug or a larger Labrador, our anti- bark collars are designed for them. The bark control collar is ideal for small and medium sized dogs from 15lbs to 110lbs, but it also takes effect on the big buddies up to 150lbs. The adjustable length assures maximum comfort for your dogs whereas the sound and vibration stimuli will certainly get their attention. WATERPROOF LED CLIP ON PET SAFETY LIGHT GIFT: Lovatic offers each purchase a Waterproof Spot Dog Light which increases your dog's safety and visibility. It is designed with 3 flashing modes: fast, steady and slow with battery included. The Bark Control Collar and the Spot Light attached will be a perfect gift for your beloved dog. TIPS FOR USE: To get the best results of using the Anti bark collar, we suggest customers making the most suitable adjustment for your dogs, not too tight or too loose. Moreover, do not leave the collar on the dog for more than 6-10 hours, check the battery weekly, keep the collar dry and take notice if the dog keeps barking because of thieves, dangers or natural disasters.