The Thermacell Mosquito Repellent Refills come in a convenient 2-pack, providing long-lasting protection for up to 72 hours in a 20-foot zone. These scent-free refills are designed for use both indoors and outdoors, making them versatile for various settings. The liquid formulation is easy to use and features a blue color. The Thermacell brand is trusted for its effective mosquito repellent products, and these refills are pet safe, rechargeable, and odorless for a hassle-free experience. Made in the United States, these refills are a reliable choice for keeping mosquitoes at bay.