Thread: Lost car keys
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Harry Bloomfield[_3_] Harry Bloomfield[_3_] is offline
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Default Lost car keys
presented the following explanation :
Anyone know what the range of these things is? It's not a remote unlocker, it
just oks the ignition. It takes a coin cell.

The RF ID chip is a grain of rice size and derives it power from the
device which interogates it, a coil around the ignition lock. Rang is
just a few inches. The coin cell is only for the remote un/locking
system.
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