1.3 Heating Modes The electric hand warmer has an intelligent temperature control chip that precisely regulates three heat settings: 45°C (113°F) for home use, 50°C (122°F) for daily heat, and 55°C (131°F) for outdoor cold. Triple thermostat technology monitors temperature and avoids overheating and risks. 2.Magnetic Design The electric portable pocket heater features a split magnetic design with a strong built in magnet that allows for easy separation or combination. By using a superconducting graphene heating film and a heating fibre made of a nano aluminium alloy, uniform 360° heating is achieved. 3.Long Battery Life The rechargeable hand warmer is equipped with a 2500mAh battery, which is charged in just 1 hour and allows 4 to 6 hours of continuous heat or charging the mobile phone. It has an integrated overcurrent, overvoltage and lithium protection system. 4.LIGHTWEIGHT PORTABLE The hand warmer features an ultrathin, lightweight, ergonomic olive shape design, which fits comfortably in the palm of your hand and is great to grip. Thanks to its compact size, it can be easily stored in a bag or backpack, making it an ideal companion for commuting in winter, warming up in the office and outdoor adventures.