The Mortein Mosquito Control Liquid Refill is a product designed to provide effective protection against mosquitoes for up to 30 nights. It is a liquid refill used in compatible electric mosquito repellent devices. The liquid emits a mosquito-repelling vapor that helps create a mosquito-free environment, allowing you and your family to have a peaceful and undisturbed sleep. The formula is specifically crafted to target mosquitoes and other flying insects, ensuring a comfortable and safe living space. With its long-lasting effectiveness, the Mortein Mosquito Control Liquid Refill is a convenient and reliable solution for keeping your home free from mosquito nuisances throughout the night.