Mortein Smart+ Refill with Free Dettol Soap" is likely a offer where you get a refill pack for the Mortein Smart+ mosquito repellent device along with a free Dettol soap as an additional incentive.

Mosquito Repellent Refill: The Mortein Smart+ Refill is designed to fit into the Mortein Smart+ mosquito repellent device, which is an electric vaporizer that releases mosquito-repelling vapors to keep mosquitoes at bay.

Long-Lasting Protection: The refill pack is usually formulated to provide a certain number of hours or nights of protection against mosquitoes, depending on the specific product variant.