Product material: ABS+PBT+PTC heater Product size: 19.7*16.5*13.85cm Product power: 500/900W Product power supply: 220V Special FeaturePortable, Electronic Thermostat, Overheat Protection Indoor/Outdoor UsageIndoor Power SourceCorded Electric 1. INSTANT HEATINGLarge area of air outlet coupled with unique product technology, can start heating at the first time of start-up, while having two temperature adjustments, so that you have more choices in heating efficiency and sustainability. 2. INTELLIGENT THERMOSTATThe use of ceramic PTC heating sheet with compact aluminum sheet, so that the heat is evenly distributed, continuous heat high efficiency conversion of heat energy, safe constant temperature can be maintained in any room at a stable temperature. 3. HUMANIZED DESIGNHoneycomb type grid window large air outlet, enjoy the effect of warm air over a larger area; The back ventilation channel prevents the air does not circulate, resulting in excessive temperature, using convection mode, blowing farther, and dissipating heat faster. 4. LIGHT&QUIETCentrifugal negative pressure air duct system, soft warm air, noise as low as 36dB, you can enjoy a quiet sleep even at midnight. 5. SECURITY MODULE Fire retardant: Heater use of fire retardant PP material to make the shell, nip flames in the bud; Overheating & Tip-over Protection: this space heater has built-in mechanical anti-dumping switch, it will auto shut off as soon as it is knocked over, to provent accidents, safety is more assured.