Long-lasting Heating Than Ever - This rechargeable hand warmer offers up to 4-8 hours of warmth. Longer battery life than other handwarmers. No more longtime wait, quick charge only 2-3 hours. No longer worry about battery life span Instant Heat & 3 Levels Temperature - No more cold hands, our double-sided hand warmer quickly heats up to 95℉ only 3 second. Low temp: 95-108℉, Medium temp:108-118℉, High temp:118-131℉ for choice by your like 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 Ultra-fast Charge and Recharge: To get the hand heater full recharge in just 4-5 hours with the 18W USB C wall Charger or micro-USB QC charges. No more longtime wait. No longer worry about battery life span Real Comfort & 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