TM Card(iButton) is sealed with stainless steel (su304-0.3), sturdy & durable, rust-resistant and corrosion-resistant. Its insulation materials are made of heat- resistant resin with a good seal performance, aging-resistance, moisture resistance, heat–resistance。

Spring leaf built in TM Card( iButton) is made of deformation-proof stainless steel and is 100% conducted by low & high temperature test, water tight test and electrical specification test. tm card(iButton) features glossy and flat surface. built-in chip is made of high quality gold-plated board and manufactured with high integrated chip on board (cob) technique。

TM card( iButton) data accessing is still available in water or after distortion. Wafer-boned chip built in tm card is of high quality and reasonable prices。

TM card(iButton) is widely used in security patrol, door lock of sauna house, electronic door lock, intercom access control system, all-purpose card system, identity identification, bank, communications, railway traffic and so on.