... smaller size, greater capacity, more environmentally feather, can be reusable for 500 times.Using Ceramic heating element to save energy, get ... like.- Using instruction:There are three buttons, 0 for OFF, .for low temperature, .for high temperature.When the warmer is ON, then the ... not use the product near high-temperature heaters such as electric blankets, stoves and so on. 1800mA battery hand warmer ...