iButton Data collector/reader L812, Stainless steel shell, durable, waterproof, shockproof, antimagnetic, anti-disassemble. Product Introduction: Name: Contact Guard Tour Checking (Short wand)Model: L812Memory ... lithium battery Product Features:Stainless steel shell, durable, waterproof, shockproof, antimagnetic, anti-disassemble. With genuine leather cup to protect the wand Working ...