Automatic Extra Safe Anti Bark Training Collar, Geega Pet Warning Beep Vibration No Shock Adjustable Stop Barking E Collar with 7 Level Sensitivity Button Control for Large Medium Small Dog (Black) 100% harmless extra safe no bark dog collar with warning beep, vibration and NO shock;the function of this collar can be tested by blowing to the testing hole continuously with Beep sound followed by vibration; may not work on all the dogs due to the less powerful beep sound and vibration comparing to electric shock, but TOTALLY NO HURT to your dog Easy collapsible light weight electric dog barking collar with adjustable black nylon strap for 10 to 120 pounds breeds with 7 to 25 inches neck; ideal for sport dog like Labrador Retriever, German Shepherd, Golden Retriever, Beagles, Bulldog and other breeds; please make sure to adjust the nylon strap properly even with extra nylon strap trimmed to ensure the close contact between the plastic electrodes with dog's throat Adjustable 7 level sensitivity button control automatic comfortable barking correction collar with beep sound and vibration intensity gradually increased; 1 minute pet protection mode once the training device continuing stimulus for 7 times; LED battery power indicator Easy installation, function testing and verification bark free dog anti bark collar; mini, medium and big dog training collar for a no bark quiet indoor and outdoor environment; starting with warning beep till the highest intensity of louder beep and vibration Not waterproof and not recommended for small puppy with less than 8 pounds; even it might not be powerful enough for certain dog, but we would still recommend this 100% no hurt version training collar first as Geega will provide 30 days money back guarantee and 12 months warranty