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Linear's IEI brand Model 0-297300 ProxKey III Custom Coded Wiegand 125 kHz HID Compatible Proximity Key Fob has become obsolete and is now discontinued. As a replacement part, a new style ProxKey III is now available.
The new style Proxkey III can be ordered using the Model number 0-297300A. This new style ProxKey III functions identical to the previous unit, and as a bonus, is smaller and thinner than the previous unit.