Product Usage: electronic fan, hair drier, air conditioner, saving lighting bulbs, LED light etc. Product Parameter:Input Voltage: DC3V~6V, DC6V~24V, AC100~130V, AC200~240VOutput Voltage: DC-3V~-4V, DC-4V~-5V, DC-3V~-7V, DC-3V~-7VProduct Size: 56*31*26mmAnion Density:2,000,000pcs/cm32,500,000pcs/cm33,000,000pcs/cm33,000,000pcs/cm3 Aproval Cert: CQCTUVUL,CEProduct Usage: Electronic fan, hair drier ...