Школьный рюкзак Wheel Bee Generation Z 950021, многоцветный, 46 см x 32 см x 20 см

Features: INTEGRATED LED LIGHT for increased visibility and safety | USB PORT with cable | Headphone exit | Reflective stripes | Quality SBS zippers | 3 large departments, 1 smaller department, 3 hidden »theft-safe« pockets | Lap top department | 2 Powerbank pockets | Accessories organizer | Hard and padded back with air circulation system | Padded bottom | Padded shoulder straps | Height adjustable shoulder straps | Reinforced backpack holder | Waist straps | Chest straps with SAFETY WHISTLE | Skateboard/clothes holder pocket | Clothes side straps | Side pockets | Easy zipper handler

Why we use GREEN LED lights and not any other ?

The human eye sees color over wavelengths ranging roughly from 400 nanometers (violet) to 700 nanometers (red). Light from 400-700 nanometers is called visible light or the visible spectrum