Electric Hand Warmers Rechargeable 2 Pack 3000Mah*2 Portable Warmer Battery Operated Fun & Practical Useful Gifts for Men Chrismas Outdoor Camping Gifts Hunting Accessories and Gear

[3 Heating Level 5-20 hours Working Time]Our rechargeable hand warmer offers three levels of temperature. At an ambient temperature of 20°C the first heating level can work for 20 hours the second heating level can work for 14 hours and the third heating level can work for 8.5 hours. At -15°C the first level can operate for 8.5 hours the second level for 7.5 hours and the third heating level for 5 hours