... 1.PTC Heater for mosquito repellent 2.convenient to installation 3.stable and secure 4.temp. self-control 5,long lifetime PTC heater, ... self-controlled heaterThe temperature can be controlled by PTC itself.Long life, stable temperature, double voltageLittle higher ... the temperature difference would be about 10PTC PTC self-controlled heaterOur company can supply PTC heater with ceramic shell, or ...