Features Adopts of PTC ceramic heating element and aluminum tube, low thermal resistance, high heat transfer efficiency This product is a electric heater with automatic constant temperature and energy saving This PTC ceramic air heater has the characteristic of high security, and surface insulation. With mounting hole, easy installation Application: air conditioner, electric heater, instrument, general appliance, air curtain machine, humidifier Specifications: Heat material: PTC Voltage: 220V( no need to Distinguish positive or negative pole) Power: 600W L-e-a-d material: high temperature resistant wire Hole pitch: 104*68mm/4.1*2.7in Installation hole: 8*4mm Size:125*77*26mm/4.9*3*1in(with ripple length of 80mm) Weight: Approx.201g/7.1oz Package list: 1 x Ceramic Air Heater Note: with 160 degrees normally closed temperature control protector, the heater can not be dry burning Package List