Say goodbye to winter chills with this battery-powered heater. Two compact units snap together with strong magnets for dual side or single hand use, and are easy to carry and store. UL certified with a safety temperature control chip and dust proof USB C port, they provide reliable daily use. Lightweight and pocket friendly, they make an ideal winter gift for family, friends. Stay comfortable for 4-8 hours, perfect for outdoor activities like camping, golfing, hiking, skiing, or for anyone with cold hands in chilly weather.