1.combined auto ref/keratometer 2.Kerea Charops brand, 5.7'' LCD monitor 3.professional quality, fast delivery time,nice servi auto refracto/keratometer CRK-7000 Korea Charops: good quality, favorable price, fast delivery time Specification:Measurement RangeSphere -20D~+20D (VD=12mm) 0.12D/0.25D stepsCylinder -10D~+10D 0.12D/0.25D stepsAxis angle 1°~180° 1°stepsPupillary Distance10~85mm 1mm steps ...