Feature:1. [Double Sides Heating] Double side heating, moderate temperature, sile shell, faster and more uniform heat conduction.2. [Exquisite Workmanship] Adopting the touch paint process, the surfaces of the hand warmer is delicately treated, feels comfortable.3. [Mini Portable] This hand warmer is small and cute, and can be easily put in your pocket. It can keep your hands warm in the cold winter.4. [Multiple Protection] This hand warmer heats evenly, keeps heat for a long time, controls the temperature of the chip, automatically cuts off the power.5. [Wide Application] This mini portable hand warmer is suitable for using in classroom, office, library, tea house, home, .How to Use:1.?Turn on the hand warmer function: three speed heating (continuous heating at high temperature is about 55°)Long press the switch button for 2 seconds, the battery indicator (the middle one) will be on for a long time; the explanation is: the hand warmer function the 3rd gear is successfully turned on.2. The 2nd gear heating function adjustment: (heating working continuous temperature is about 48°)In the original three speed working state: press the button once, and the battery indicator (the middle one) will flash continuously for 2 times without interruption; the second‑speed (hand warmer function) is adjusted successfully.3. Adjusting&nb