... out Specifications Sphere: 0.0 to -29.50 Diopters, step: 0.25,0.50,1,3 0.00 to +26.75 Diopters, ... step: 0.25,0.50,1,3 Cylinder: 0.0 to ± 8.75 Diopters,step:0 ... 80mm in 0.5mm step Retinoscope: +2.00D or+1.50 both sides Corneal alignment: 12 to 20mm by 2mm step ... weight:5.0kgPower supply:AC 100-120V or 220-240V 50/60HzHorsepower:90W Package dimensions:590×470×470mmGross weight:15kg ...