The iButton is an electronic chip armoured in a 16mm stainless steel can. Because of this unique, durable package, up-to-date information can travel with a person or object. The stainless steel button is rugged enough to withstand harsh outdoor environments; it is durable enough for a person to wear everyday
on an accessory like a ring, key fob, wallet, watch, metal card or badge. It is also waterproof and so can be worn while washing or swimming.