Warranty: 1 year Taglines: Features: Advanced third generation technology Hartman testing method Green led light source, direct reading, no need for abbe compensation Wide dioptor and prism measurment range for spherical lens, cylinderical lens, progressive multi focal lens , hard and soft contact lens. Low transmittance lens and low astigmatism lens measurable 20 diopter prism measurement 7" color tft touch screen Pd, ph, uv, and thermal printing function Auto lens type detection User -freindly interface Sphere power (sph): -25 m-1~+25 m-1 Cylinder power (cyl): -9.99 m-1~+9.99 m-1 Axis (ax): 0~180 , prism basal angle :0~360, 1 increments Addition: -9 Prism: 0~15 (horizontial direction) Step: Pupil distance (pd): Pd =42mm~82mm Lens diameter: 10mm~90mmdia Uv tester: Measurable: Contact lens: Display: Printer: Power source: Dc 12v, 45va Weight: 6kg Power supply: Input ac 110v-240v, 50hz-60hz out put dc 12v, 45va