During cold temperatures, your phones battery will wear out quickly and could even cause irreparable damage to your phone. With the Warm Up case allows your battery to maintain the perfect operating temperature thanks to the heating pad regulated by a ventilation system.; Built-in heating pad and ventilation system that maintains phone's temperature down to -40 degrees Screen functions can be used through tactile window Included in box: Warm Up case, remote controller and charging cable, t-slot ball, 3 mounting systems (ring mount, T-fighter mount, mirror mount), rain cover and dual USB charger Compatible with phones measuring up to 6.3" Built in tactile window for easy phone use Has suncap to block sunlight from above Landscape orientation