iButton Data collector/reader L812, Stainless steel shell, durable, waterproof, shockproof, antimagnetic, anti-disassemble. ... Introduction: Name: Contact Guard Tour Checking (Short wand)Model: L812Memory:2,000 records/8,000 recordsSize: 120*24.5 mmWeight: 180gPower ... the transfer of bank, bus transfer and so on. iButton reader with 8000 records memory