COST-EFFECTIVE PEST SOLUTIONS. Two flea and tick collars, a flea comb, and a tick tweezer save you money and efficiently solve your pest problem..SAFE AND NATURAL TREATMENT COLLARS. ShengKou collars use advanced technology to refine essential plant oils into a PVC carrier to reduce chemical irritation. Still, they are not suitable for pets that are sick or have skin allergies..NICE SCENT. ShengKou collars have a citronella scent that usually lasts two to three weeks. If your pet doesn't like the smell, you can open the sealed bag and use it two to three weeks later..PROTECTION TIME. Each collar has a protection time of about six months. Although the collar is waterproof, if often played in the rain may shorten the protection time..WATERPROOF COLLAR. Product active ingredients have been integrated into the PVC carrier, will be slowly released, and distributed in the pet skin oil layer to achieve the purpose of pest repellent; note: the weakening of the smell does not mean that it does not work..The safe breakpoint design can make it your pet easy to get out of trouble..Shipping with FBA will enable you to receive the goods as soon as possible.