water sensitive sticker turn red when got wet device potential damage indicator warranty void warning label repair guanantee

material: water sensitive paper, white color, turn red/blue when contact water, and never fade. purpose: water exposure indicator for packages or devices, if you see the label is red, potential damage may occured. usually it show that repair guanantee invalid. how to use: usually this water sensor stick to the inside part of mobile phone, tablet, lap or other electronics devices etc..syi