8 MONTHS PROTECTION:Parenda flea collar works around the clock to helps your beloved furry friend get rid of internal & external fleas,ticks ,flea larvae and lice.The protection can last for up to 8 months. NEW FORMULA: 100% natural ingredients,Parenda Flea Collar only contains a proprietary blend of essential oils.hypoallergenic, no mess,odorless,non-greasy,safe and effective. UPGRADED DESIGN:The Parenda flea collar adds a waterproof design and an emergency breaking point that allows your dog to walk and play in the rain or wet snow without worrying about their safety and the effectiveness of the collar. ONE SIZE FITS ALL: We designed our collar is 27.56 inches long to ensure that it fits any size of dog, and works with every breed of dog. The collar is fully adjustable and you can cut the collar to adjust it to the proper length for your dogs. 100% SATISFACTION GUARANTEEE:If you are not satisfied with the Flea and Tick collar, we will offer you a full 100% refund within 45 days of your purchase. Please feel free to contact us if you have any question regarding our collar.