Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! capability to measure light intensities accurately across a broad range, making it a vital tool in where light quality and intensity directly impact biological processes. ensures that the PAR meter's sensor is completely protected from dust and can withstand continuous immersion in water. Accurate light measurement is essential in studying natural ecosystems, understanding how changes in light conditions affect plant communities, and monitoring the health of habitats. PPFD Measurement Repeatability: ±1 μmol/m²/sec Measurement Range: 0~4000 μmol/m²/sec Display Resolution: 0.1 μmol/m2/sec (0~999); 1 μmol/m²/sec (1000~4000) Cut-On Wavelength: 400 ±10nm Cut-Off Wavelength: 700 ±10nm Data logging function: record up to 100 groups of data Operating Environment 32°F to 122°F (0°C to 50°C); 0~95%, non-condensing Storage Environment -4°F to 140°F (-20°C to 60°C); 0~95%, non-condensing Material: plastic colour: As shown Package Contents: 1 x PAR Meter 1 x English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.