Shenzhen 3NH (ThreeNH) Technology Co., Ltd. Shenzhen TILO Technology Co., Ltd., hereby declare we only use the domain name suffix enterprises email address (xxx@3nh.com and xxx@tilo.cn) to contact you.

CE-certification or CE Marking is a conformity marking consisting of the letters CE. The CE Marking applies to products regulated by certain European health, safety and environmental protection legislation. The CE Marking is obligatory for

The color difference unit, NBS, is derived from the unit of color difference formula which is established by Judd-Hunter. In 1939, the American Bureau of Standards adopts this color difference formula and calculates the color difference acc