For years, Thermacell has made effective mosquito repellent solutions, but the same highly portable designs that make them so good for camping and small spaces make them less suitable for whole-yard protection. They're looking to change that with the Liv. This permanently-installed, powered system uses multiple repellers and an app-controlled hub to provide on-demand convenience. The base system includes three repellers and covers up to 945 sq. ft., while the largest, five-repeller version can cover nearly 1,600. Beyond simply turning the system on and off, the app also provides voice control via Amazon Alexa and Google Assistant, repellent level monitoring (each pod lasts for around 40 hours), and scheduling.