| Measurement range | 0~199 |
| Measurement content | Blue light whiteness r457 |
| light source | LED light source |
| Illumination conditions | Comply with GB/T3978 regulations |
| Display | LCD liquid crystal display |
| Measurement aperture | F30mm |
| Resolution | 0.1 |
| Sexual repeability | 0.2 |
| Error of indication | ≤±1 |
| Operating Environment | Temperature (5 ℃~ 35 ℃); Humidity (≤ 85% RH) |
| Transportation, storage environment | Temperature (-20 ℃~ 50 ℃); Humidity (≤ 90% RH) |
Warranty days: 365 days
1. For product quality problems caused by non-human products of instruments and equipment, the manufacturer will provide free warranty services during the warranty period;
2. There is no warranty period for fragile and consumable parts, and if you find product quality problems after receiving the goods, please apply for return and exchange within 7 days, and you will not wait for the overdue ones;