Paipaitek 2018 Upgraded Rechargeable Dog Bark Collar Anti-Barking 5 Levels Automatic No Bark Collar Small Medium Large Dogs No Harm Shock Safe Stop Bark (6+lbs) INTELLIGENT ANTI-INJURY CHIP: Your dogs safe is our top priority.Continuous shocking your dog 7 times within 1 minute, no bark collar will entry sleep mode for 1 minutes,unlike a traditional electronic shock collars that trains your Dog to respond to pain. HUMANE AND EFFECTIVE: Stops unwanted barking with progressively increasing warning sounds and harmless static stimulus,For your dog's protection,The use of 6V safe voltage and intelligent humanized design can not only make the dog obedient, but also do not harm the dog's body. ADJUSTABLE HIGH TECH DESIGN: Lightweight receiver, Unique anti-bark collar. 1-5 Sensitivity level can be adjusted to fit for different size of dogs barking and specific environments.(NOTE: When the dogs snoring or scratching their necks, will trigger beeps or shock, please set the sensitivity of the collar in 1-3 level. When the dogs barking, will not trigger beeps or shock, please set the sensitivity of the collar in 3-5 level.) RECHARGEABLE & RAINPROOF: FCC ROHS CE certificate,all the material are certified so the quality is better than the others. Rechargeable Battery , lasting about 15 days to solve the issue of batteries replaced frequent. Rainproof in rain, but not in water. FITS MOST BREEDS :To help guarantee the safety and comfort of your pet, we generally recommend the collar for dogs ranging from 6.6-120 lbs. Adjustable anti-bark collar, length adjustable from 5 inch to 23.82 inch can be a great gift for any dog lover.(Noted: Please wear this dog bark collar NO MORE THAN 18 hours.)