Long-lasting Heating Than Ever - This rechargeable hand warmer with maximum energy and offers up to 4-8 hours of warmth. Longer battery life than other handwarmers. No more longtime wait, quick charge only 3 hours. No longer worry about battery life span. Enjoy Sun-like Warmth - No more cold hands, the pocket hand warmer with double-sided heating, quickly heats up to 95℉ only 3 second. 3 Levels temperature - Low temp: 95-108℉, Medium temp:108-118℉, High temp:118-131℉. It's offers both your hands full-scale warmth no matter at indoor or outdoor. Intelligent Protection - Smart temp control system equipped with an integrated temperature sensor will switch off automatically when the temperature exceeds 131°F(55°C). Built in multiple protection technologies to keep the hand warmers away from over-voltage and over-charging. Comfort & Portable - No more traditional cold metal warmers feeling like holding a stone. With thousands of polished surface, more smooth and warm. The curvy body and pocket size design to fits your hands better. Great for handy carrying in anywhere while ourdoors - golf, fishing, hiking, camping, skiing. Real Warm Gift - Smooth and warm surface, palm-size, curvy body and ergonomic design. It's just a easy to hold and comfortable hand warmer. With exquisite package box and greeting card, this is a must have warm gift in winter.