Check the listing for details. Ophthalmic Equipment Ocular Screening Auto Matic Refractometer Hand Held. Condition: New. Listed at 5704.00 USD. Optical instrument SW-800 handheld auto refractometerFeatures1. The portable auto refractometer can check the refractive error precisely for different groups of people using the ultrasonic ranging, cross line, flashing light and sound technology and then to find out the probably potential refractive problems.2. Ideal for babies, seniors and patients with language barrier. Specifications Operation modeBino/MonoOptometryAutomaticDSRange: -7.50D~+7.50D, Resolution: 0.25D/0.01DAccuracy: ±0.50DDCRange: 0.00D~3.00D, Resolution: 0.25D/0.01D, Accuracy: ±0.50DAxisRange: 1°~180° Axis: Range 1°~180°Resolution: 1° Accuracy: ±5°Pupil sizeRange: 4.0mm~9.00mmResolution0.1mm Accuracy: ±0.1mmPupil distanceRange: 35mm~80mmResolution: 1mm, Accuracy: ±1mmGaze0°~20°Measuring distance1m±5cmTime per measurement~1sFixation targetLight flash, attractive soundDate interfaceWi-Fi, USBBatteryRechargeable lithium batteries, 6 hours of duration, ReplaceableSize180mmX130mmX110mmDisplay5 inch touch screenWeight0.8KgOptional accessoriesCamera tripods, printer, etc