| Features | E20+ |
| Technology | Conventional single point measuring beam. |
| Measuring Bean & Wave Length | Conventional mono-red LED measuring beam. |
| Measurement range | Sph: ±22D |
| Cyl: 0~ ±10D |
| Step: 0.01 /0.12/0.25D |
| Axis :0~180°(step :1°) |
| Add: 0~ +10D (step:0.12/0.25D) |
| Prism: 0 to 10Δ |
| Step: 0.01Δ |
| Measurable lens Dia | 25mm ~100mm |
| Measurable lens | Frame lens; Single lens; Bifocal; Multifocal & Progressive lens; Hard & Soft Contact Lens (with proper holder) |
| P.D measurement | 45-85mm by mechanical PD knob movement. |
| Frame length measurement | N.A. |
| U.V Measurement(370mm) | N.A. |
| Display | B & W monochrome |
| Printer | Thermal Printer: 58 mm wide |
| ABBE value compensation | Can be selected from 30~90. |
| Interface Connector | RS232 |
| Power Rating | 100-240VAC / 50-60Hz / 60 VA |
| Dimension/Net wt. | 23 (W) x 29 (D) x 42 (H) mm. Approx 8kg. |
| Packing/Gross wt. | 53 (L) x 36 (W) x 42 (H) mm. Approx 9.50kg. |
| Environmental Condition | Temp: 0⁰ C ~ 40⁰ C/Humidity: ≤85% |
