• Set of 4 USB mosquito repellent devices and 100 refill tablets. • Creates a mosquito protection zone of up to 6 meters without the need for sprays. • Portable USB-powered design compatible with computers, power banks, and car chargers. • Simple operation by inserting the tablet and connecting to a USB port. • Includes a safety protective net that prevents direct contact with the heating plate. • Ideal for use in the home, bedroom, office, camping, travel, and vehicles. • Provides up to 10 hours of continuous protection with each connection. • Compact, efficient, and odorless solution to maintain an insect-free environment.