Seresto Flea & Tick Control Collar is the longest-lasting single application flea and tick protection available giving you peace of mind for 7-8 months as one collar is all it takes to keep your dog protected.This collar is clinically proven to kill fleas within 24 hours and actively repel and kill ticks through contact so no bite is required for it to work.Key Features: Clinically proven to be effective against fleas and ticks for 7-8 months Kills fleas through contact and repels and kills ticks before they bite your pet Water-resistant Odourless Targets: Fleas ticks and biting/chewing lice Suitable for small dogs weighing under 8kg How to apply: Remove the collar from the protective bag directly before use. Unroll the collar and remove any remaining plastic connectors on the inside of the collar. Adjust the collar around your dog’s neck without tightening it too tight (it should be possible to insert two fingers between the collar and the neck).  Pull excess collar through the loop and cut off any excess that extends beyond 2cm.  Check periodically and adjust if necessary especially in growing puppies.