... for OFF, .for low temperature, .for high temperature.When the warmer is ON, then the LED indicator turns red, at the ... in a dry place.During use and storage, if the warmer appear abnormal phenomena such as smelly, hot, discoloration, deformation and ... heaters such as electric blankets, stoves and so on. hand pads USB hand warmer hand heater hand pack with 1800mA lithium battery with CE & ROHS for ...