Dual Use - Power Bank & Hand Warmer Capability: This versatile rechargeable hand warmer doubles as a USB power bank, which is a handy bonus for emergencies. Also included is a USB-C cable, allowing you to charge your device anytime, anywhere. True Dual-Sided Heating: Moving beyond "Requires Assembly Dual-Sided Heating" setups that require combining two devices to achieve dual-sided heating—since they only heat one side when used separately. Each of our units delivers genuine double-sided heating for full wrap heat. 4-inch Full-Surface Heating & Portable Design: Differing from traditional electric hand warmers with a small central hotspot, our innovative design features TWO 4-inch aluminum heating plates that wrap around the entire device, creating a broad, uniform heating surface. This allows heat to penetrate gloves or thick clothing, providing sustained warmth even in extreme cold conditions. This portable hand warmer design with palm size 1 x 2.4 x 4 inches easy to take-on-go when you need. AI Smart Heating & 5200mAh Campacity, 3-Level Settings: Say goodbye to disposable hand warmers, this rechargeable,reusable hand warmer features a 5200mAh battery with 3 temperature settings for instant, precise heating. An advanced AI chip actively adjusts temperature for safe, reliable operation. At the lowest setting, it delivers up to 11 hours of continuous comfort, ensuring you stay smartly, safely, and comfortably warm all day long. The Perfect Tech Gift for Men: This electronic hand warmer is perfect for winter outdoor activities like camping, hunting, hiking, skiing, golfing, and fishing—or anyone seeking relief from cold hands or Raynaud's. It delivers a revolutionary experience and will become one of your favorite winter essentials. KARECEL Rechargeable Hand Warmers Electric Hand Warmer Reusable Handwarmers, 5200mAh Powerbank Portable USB Novelty Hand Warmer Heater Battery Charger Pocket Warmer, Gift for Men and Women in Cold Weather Winter Outdoor Sports and Ski Gadgets