1. Compact design, easy to use every day2. User-friendly, large screen display and easy to operate3. Record up to 100 measured values4. For real-time display, it shows the last four recorded data5. MAX / MIN / AVG DataImportance of Photo Synthetically Active Radiation (PAR) Meter:Photosynthetically Active Radiation (PAR) refers to the spectral range of solar radiation that is crucial for photosynthesis in plants. This light energy is absorbed by pigments such as chlorophyll, initiating the process of converting carbon dioxide and water into glucose and oxygen.PAR meters measure the intensity of light within this range, providing valuable information for optimizing plant growth, determining optimal light levels for indoor cultivation, and assessing the effectiveness of artificial lighting systems.Hold function.Auto turn off function after 3min of no usage.Simple calibration function.With tripod socket.Low battery indicator.SPECIFICATIONS:PPFD (Photosynthetic Photon Flux Density) Measurement:1. Range:0-5000 μmol/m²/sec2. Repeatability:±1 μmol/m²/sec3. Display Resolution:0.01 μmol/m²/sec (0-99.99); 0.1 μmol/m²/sec (100-999); 1 μmol/m²/sec (1000-5000)4. Measuring rate:1 measurement per second5. Cut-On Wavelength:400±10nm6. Cut-off Wavelength:700±10nmPower Supply:2 x AAA battery(Not included batteries)Please note:There are slight color differences or variations in kind. Does not affect the use, please do not mind, thank you!Colour:As ShownMaterial:PlasticPackage Contents:1 * illuminance meter1 * English instruction manualOnly 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.