Haoran Rechargeable Hand Warmers, 5200mAh Portable Pocket Hand Warmer/Power Bank, Double-Sided Reusable Hand Warmer for iPhone and Android Card for Women Men 2 IN 1 HAND WARMER POWER BANKThe reusable hand warmer built-in 5200mAh lithium ion battery, it can continuous warm your hands 4-8 hours, charge your phone 1-2 times, which have 3 indicators to let you monitor the remaining battery capacity and heating status. DOUBLE -SIDED HEATING & 3 HEAT MODESRapidly warm up double sides in 1 second. 3 levels of adjustable temperature 95-107F/104-118F/118-131F, press the switch and instantly release the warmth for you. GREAT CHOICE FOR OUTDOOR RECRACTION: USB electric hand warmer for camping, skiing, cycling, climbing and other winter outdoor sports, charge your phone and warm your hands at the same time. Portable and compact as well anti-skid in one hand. PERFECT HAND WARMER FOR GIFT: The optimized and upgraded circuit ensures its long lifetime. Certified by FCC, CE, ROHS, and Eco-friendly polymer battery. BUY WITH COMFORT OF MINDHaoran hand warmer comes with 24 hours professional service center, 30 days money back warranty, 24 months quality guaranteed. Excellent customer service brings you no worries after purchase. Please Keep away from water; Do not charging and heating simultaneously; Please stored in a cool dry place when not in use; Put on Cloth pouch to avoid burns when they get too hot for skin contact especially say on the wrists or behind knees where skin is thinner and more fragile.