Turn on/off light mixing to easily hide numbers and avoid phone harassment. Dual number multi-person storage sharing. Wide coverage, shared by many people, to meet the needs of different occasions. Strong anti-shake design: The double line super glue is stronger and more anti-shake, washable and can be pasted repeatedly without leaving traces. Easier and more reliable installation design, firmer and not easy to fall off. Suitable for different number combinations. White numbers ensure high definition and are clearly visible day or night. Sunscreen design: Specially selected heat and cold resistant materials, specially designed for sunscreen, suitable for greasy hot and cold, applicable temperature range from -60C to 80 vs.