Type:Humidity cardUsage:Electronics, Hardwares, All need indicate humidityProduct name:humidity indicator cardMaterial:paper with humidity indicating reagentType:one dot, 3dots, 4dots, 6dots, designedSize:37*105mm, designedFunction:indicate humidityApplication:electronics, garment, suitcase, metalsFeature:cobalt free, DMF freePackage:vacuum plastic bag and tinplate packPrinting:english or designedColor chage:blue to pink, brown to azure