1.envoirement friendly,2.green products.3.without freeon.4.coolant:R134A,R407C.5.air compressor:Biza,Hitachi.etc.6. 220V/1PH/50HZ, 380V/3PH/50HZ or 110V/1PH/60HZ.Green refrigerator air dryers by Apureda have many styles as wind style, hydraulic style, regular style, high temperature style, high...