Features 1、Adopts of PTC ceramic heating element and aluminum tube, Low thermal resistance, high heat transfer efficiency 2、This product is a electric heater with automatic constant temperature and energy saving 3、This PTC ceramic air heater has the characteristic of high security, and surface insulation. 4、With mounting hole, easy installation 5、Application: air conditioner, electric heater, instrument, general appliance, air curtain machine, humidifier Specification 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 The lead material adopts high temperature resistance wire, safe for use Application: air conditioner, electric heater, instrument, general appliance, air curtain machine, humidifier Made of high quality material, with long serving life Specifications: Heat material: PTC Voltage: 110V Power: 250W Size: 155 x 35mm / 6.10 x 1.38in (with ripple length of 96mm) Weight: 113g Package included: 1 x Ceramic Air Heater Note: two wire is same, not need to distinguish "Positive pole"and "negative pole Package List