HP IPAQ RX3000 - Manual (Page 54)

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Ä CAUTION: SD cards must first be unlocked before removal. Do not try
to pull SD cards out of the expansion slot. Be sure to unlock the SD cards
before removal. Failure to do so may damage the expansion slot.
Note: Expansion cards must be purchased separately and are not
included with your HP iPAQ.
To locate information about expansion cards, go to the following
HP Web site:
www.hp.com/go/ipaqaccessories .