electrical hand warmer

1.Long warming.Take 8-14minutes to heat up only, which can keep warming hand for 2 hours and warming quilt for6 hours. 2.Automatic power-off .When temperature reaches 70 degree, the power will cut automatically to prevent to heating.3.Explosion proof. In case of the thermostat broken,the other expansion controller will begin to operate. When the temperature is up to 90 degrees, the expansion controller star to expand and break both electrodes so as to shut off the power supply.4.Quality is reliable. The warm bag is made of ultra-strong rubber film composite fiber. The heating medium is used to heat up the heating element and reserve the energy .5.Comfortable hand feeling. The warmer bag cover is made of cotton flannel with soft and comfortable hand feeling.The warmer bag has a good fomentation effect especially for arthritis, cervical vertebra ache, lumbago and chilblain. It features quick warm-up and longer reservation of temperature. Once it is electrically charged for 8 to 14 minutes, it could maintain warming for 2 to 10 hours. The built-in automatic thermostat is used to prevent the warmer from overheating and consequently it could protect skin from a burn. The conductive liquid inside the bag is non-toxic and non-corrosive. The warmer bag is portable and safety in use and the operation is simple. The warmer bag has a good fomentation effect especially for arthritis, cervical vertebra ache, lumbago and chilblain. It features quick warm-up and longer reservation of temperature. Once it is electrically charged for 8 to 14 minutes, it could maintain warming for 2 to 10 hours.The built-in automatic thermostat is used to prevent the warmer from overheating and consequently it could protect skin from a burn. The conductive liquid inside the bag is non-toxic and non-corrosive. The warmer bag is portable and safety in use and the operation is simple.