Polite Pet No Bark Dog Collar Humane method-painless warning tones followed by gradually increasing static vibration levels Warning tones & agitation levels increase only if barking persists. Relaxes as dog learns. Effective on dogs 5-150 pounds. Microprocessor controlled. Long-life 6v battery. Small & lightweight design. Water resistant. Limited lifetime warranty. Comes with manual. Send a photo of your pet modeling this collar to gainkeeper@gmail.com. It may be selected as pet-of-the-month & featured on my Amazon ad.