[Innovative Design with Digital Display] This hand warmer features a sleek and modern design, complete with a digital display that shows the exact temperature, ensuring easy control and monitoring for your comfort [Three Adjustable Heat Levels] Choose from three heat settings: 40/50/60℃, depending on your needs. Whether you need mild warmth or high heat, this hand warmer has you covered in all weather conditions [Dual Functionality: Hand Warmer and Power Bank] Not just a hand warmer, this device also functions as a power bank. You can charge your phone or other devices on the go, making it a versatile tool for everyday use [Double-Sided Heating for Maximum Warmth] Enjoy warmth from both sides of this hand warmer, ensuring your hands stay cozy in cold weather. The efficient heating design provides uniform warmth for lasting comfort [Large 2400mAh Battery Capacity] With a powerful 2400mAh battery, this hand warmer offers extended use, keeping your hands warm for hours. It's perfect for long outings, winter travel, and outdoor activities Specifications: Model: N20 Function: Charging and hand warming, with digital display Power: USB-tpye-c charging, 5V-1A Material: ABS plastic + aviation aluminum Gear: three gears (40, 50, 60℃) Conventional battery model: 18650 cylindrical lithium battery Applicable battery model: 14500, 18650 battery Battery capacity: 2400mAh Charging time: Digital display flashes during charging, 4 hours Battery life: 1.5-2.5 hours