1,iButton DS1990A-F5 2,Unique ID number 3,imported stainless steel body 4,water-proof and rust

iButtons, 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.

DS1990a diffeent bracelets are available.Main features:

Can Be Read in Less Than 5msOperating Voltage Range: 2.8V to 6.0V,Working Temperature Range: -40¡ãC to +85¡ãC

Water proof.

Dimension: 16.25mm*5.89mm (max)

iButtons DS1990A water proof