Technical parameters:
| Measurement range | 0 ~ 199 |
| Whiteness formula | blue light whiteness WB=R457 |
| Light source | LED light source |
| Lighting conditions | comply with GB/T3978 regulation 45/0 |
| Display | LCD display |
| Measuring the aperture | 15 ￠ |
| Minimum | 0.1 |
| Measurement repeatability | 0.2 |
| Error of indication | ≤ & plusmn; 1 |
| Using the environment temperature (5 ℃ ~ 35 ℃) | Humidity (& le; 85% RH) |
| Transportation and storage environment | temperature (20 ℃ to 50 ℃); Humidity (& le; 90% RH) |
| Power supply | dc 1.5V× 5 AA alkaline dry batteries; |
| Configuration | portable aluminum alloy packing case |