Item Type: Electric Hand Warmer Material: ABS Built in Battery: Lithium battery 1200mAH Working Time: 90-180 minutes 12 Gears Adjustable Temperature: 2 Gears constant temperature adjustable, you can choose the temperature you want according to your needs. 2Prevent Short Circuit: Use high quality chips, safe and stable, to ensure the normal operation of the unit, and prevent overheating and short circuit. 3Perfect Gift: Hand warmers are perfect gifts for men, women, and children on Christmas, Valentine's Day, and birthdays. They will love it very much. 4Portable: The hand warmer is small and light, easy to carry, and has a heating function to make you warmer and more comfortable in winter. 5Fast Heating: The portable hand warmer is easy to operate, and it can quickly warm up within 3 seconds by pressing the switch.1 x Electric Hand Warmer 1 x USB Cable 1 xManual