[Smart Safe Heating] - Safety is our priority, we only use premium chipset to control the heat levels. From 104F to 140F, there are 3 levels of heat to choose from, by a simple button. [Luminescence Hand Warmer] -Luminescence Electric Hand Warmer, adjustable 7 Colors Breathing Lights. Fashionable electric hand warmer. suitable for both men and women [Long-lasting Heating Than Ever] - offers much longer battery life than old generations, packed with incredibly large 10000mAh battery, with maximum energy, and minimal increases in weight. It can provide up to 18 hours of heat. [Real Comfort] - Smooth and double-sided warm surface, pocket size, curvy body, sleek and lightweight, silicone corner protection anti drop. Its just everything you need.