Long-lasting Heating Than Ever - This rechargeable hand warmer with maximum energy and offers up to 6-12 hours of warmth. Longer battery life than other handwarmers. No more longtime wait, quick charge only 4-5 hours. No longer worry about battery life span. Instant Heat & 3 Levels Temperature - No more cold hands, the 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. This hot handwarmer is your warm companion in cold winter. 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 long