expansion card slot accepts secure digital (sd), secure digital input/output (sdio), or multimediacard (mmc) expansion cards (sold separately). expansion cards enable you to listen to mp3 files, back up data, add more memory, add optional peripherals such as a camera, or use additional applications.

    ir port uses infrared technology to transmit data to and receive data from other infrared-enabled devices and to perform hotsync?operations. see “beaming data”in chapter 3 and see “conducting infrared hotsync operations” in chapter 15 for more information.

    headphone jack enables you to connect standard 3.5mm stereo headphones (sold separately) to your handheld.

    stylus to use the stylus, slide it out of the slot and hold it as you would a pen or pencil.

    power button/ keylock control turns your handheld on or off and enables you to turn on the keylock feature.

    see “keylock preferences” in chapter 16 for information on the keylock feature.