1.Adopt full-band balanced LED light source The full-band balanced LED light source ensures sufficient spectral distribution in the visible light range, avoids the lack of spectrum of white LEDs in a specific band, and ensures the measurement speed of the instrument and the accuracy of the masurmesus 2. Fast charging Special fast charging method, low-voltage reminder to charge or use of off-hours to charge, to ensure the capacity and life of the battery (note: frequent repeated charging of the battery is more harmful) 3.Grating Spectrophotometric technology Using grating spectrophotometric technology, it has higher resolution and makes color measurement more accurate 4.Place the base safely to ensure that the whiteboard is not dirty 5.Professional whiteboard, a promise that will never change color forever