High Quality & Portable - Balhvit rechargeable hand warmers are made of high-tech lithium battery, aluminum and ABS which certificated with CE,FCC. The cobblestone design handwarmers with a stylish look is portable and compact. Ergonomic design to make you more comfortable. Portable pocket design fit for traveling, sports, fishing, hiking, camping, skiing, etc.

Double-Sided Stay Warm - This cool electric hand warmer heat up within seconds. There are two different temperatures [100~115℉ (38~45℃)], 115~130℉ (50~55℃)]. Instantly release the warmth for you. It is warmed on both sides, keeping your hands cozy, and not only cold hands relief, but also helps smooth the pain and uncomfortable of menstrual, sufferers with arthritic hands and arthritis pain.

Large Battery Capacity - Balhvit 6400mAh hand warmers hothands can give a full charge to most tablets like iPad, smart phones like iPhone 11 / 11 Pro / 11 Pro Max, Huawei, Samsung, Google and other Android phones. 2 indicator lights keep you informed of the heating status. 5V/2A in/output enable you fast full recharge in 2 hours, and once fully charged can use for 5-10 hours.

Safety - Safety is top-of-mind. Balhvit reusable hand warmer have built-in intelligent protection system is provided with safeguard of power on, short circuit and over loading, etc. It is made of eco-friendly lithium battery, high-tech aircraft-grade aluminum and ABS. Ultra safety and comfortable certified by feck, CE, RoHS. It is shockproof, anti-scald, explosion-proof, and radiation-free.

100% SATISFACTION - We promise that the high quality Balhvit hand warmer will surely please you! If you are not satisfied with our USB handwarmer, please contact us and we will try our best to ensure 100% satisfaction for each customer.