Double-side Fast Heating Of Electric Handwarmers: Our reusable electronic hand warmers deliver double-sided heat to your hands in just 3 seconds. Hand warmers rechargeable features an innovative LED digital screen to show the level of charge and temperature range Temp Modes Adjustable: Rechargeable Hand warmers offer you a instant double-sided heat in just 3 sencods. 3 levels of temperatures 40/104F-50/122F-60/140F at your choice. Simply charge the device for 2-3 hours and enjoy having cozy hands for 4-8 hours! Our electric handwarmers are Perfect for winter hikes or cold morning commutes High-end Device Of Hand Warmers Rechargeable: Hand warmers, power bank and massage are integrated for your enjoyment. This 4000mAh Portable Pocket Hand Warmers featuring a USB Type C/USB Output/Micro-USB charging port. A multi-functional device, electric handwarmers features a sleek, compact design the perfect travel companion Warm Winter Gift - Hand Warmers Rechargeable: Our Long Lasting Heating Portable Hand Warmers is great for raynauds arthritis sufferers and will help you brave bitter temperatures on your outdoor adventures. Electric handwarmers is a MUST HAVE to spend a cold winter, especially for pain relief for heat therapy needs. Gift for Birthday, Mother & Father's Day, Thanksgiving Day, Christmas, Valentine's Day Safety & Package Include: Unlike other electronic hand warmers, our battery has 3 built-in temperature sensors to guarantee its safety. Hand warmers rechargeable surfaces are made from aviation aluminum with excellent thermal conductivity and heat dissipation performance.