SAFE FOR KIDS, NO CHEMICAL, NO FUMES, NO SMELL, POLLUTION FREE, NON-TOXIC, ELECTRICAL RANGE: 220-250V AC, FREQUENCY RANGE: 50Hz, POWER CONSUMPTION: ABOUT 0.5-1.2W, SOUND PRESSURE: MAX 80dB, SOUND FREQUENCY: 15000-18000Hz, RADIATION ANGLE: 150°, EFFECTIVE AREA: 18-25² METER (180-250² FEET)