Model Number: TMR901 Brand Name: Promag Key Specifications/Special Features: Simple-to-use device, that lets you read the registrationnumber (ID-code) of Dallas semiconductor's touch memorybuttonsEach button carries unique serial numberGuaranteed against duplicationBecause no two buttons can ever have the same registrationnumber, they can be used for various identification purposes(objects, people and more), also for automated password entry andlots of other applications.Read the registration number of all Dallas touch memoriesmanufactured, regardless of their model number