... control 3.stable and safe 4.keep steady power 5.no thermostat required ptc heater element for fan heater and air condition ... Spectification1. No thermostat required,virtually unlimited lift ,self-control temperature2.safty due to self-control temperature3. ... heating instrument such as wet wipe, air-adjuster, air-conditioners,drier, warm air generator, automobiles and so on. Package ...