Feature: 1. 2 in 1 Electric Hand Warmer: This portable pocket sized hand warmer is not just an ordinary hand warmer; it also doubles as a power bank. Featuring a built in 3600mAh high capacity battery, it offers a long lasting performance that ensures your hands stay warm whenever you need it. 2. 3 Adjustable Temperature Settings: The hand warmer offers 3 adjustable temperature settings of 60℃, 50℃, and 40℃, making it suitable for a variety of outdoor activities in different temperature conditions. 3. Winter Heating Device: Give this hand heater as a gift to family and friends to keep their hands warm throughout the day, whether they are at work, school, camping, traveling, or participating in any outdoor activities. 4. Safe and Practical: The 2 in 1 power bank hand warmer is equipped with an intelligent polymer chip that protects components and features automatic power off protect, ensuring that your warmth is both effective and safe. 5. Small and Portable: The hand warmer rechargeable is small and lightweight, easy to carry, you can enjoy the warmth of warmth anytime and anywhere, ensuring that you can enjoy the comforting warmth it provides no matter the circumstances. Specification: Item Type: Hand Warmer Power Bank Battery: Battery 3600mAh (shipped with built in battery) Size: Approx. 61 x 30 x 102mm / 2.4 x 1.18 x 4.02in Working Voltage: 5V 1A Charging Time: Approx. 4 hours Working Time: 2.5-12.5 hours (depending on different settings/scenarios) Temperature: 3 adjustable levels (40℃, 50℃, 60℃) Material: ABS, Aluminum Alloy, Electronic Components. Package List: 1 x Hand Warmer 1 x USB Charging Cable 1 x Instruction Manual