13 PowerEdge M620 Technical GuideModule featuresTable 4 lists the modules features for the M620 system. For additional information on these features,see theDell PowerEdge M620 Systems Owner’s Manual on Dell.com/Support/Manuals.Table 4. Module featuresFeature DescriptionUSB connectors Two front-accessible USB connectorsStatus indicator Indicator for M620 power statusHard drives Two front-accessible, hot-plug, 2.5-inch drives; see the Storagesection for detailsHard drive activity LEDs Indicate the status and activityBlade handle release button Release button on the front handle of the blade serverUSB key Internal USB connector for a USB flash memory key that can be usedas a boot device, security key, or mass storage deviceTrusted Platform Module (TPM)TPM is used to generate/store keys, protect/authenticate passwords,and create/store digital certificates; it also supports the Intel XeonTXT functionalityQuick Resource Locator (QRL)This code on the chassis can be scanned by a smartphoneapplication to access additional information and resources for theserver, including videos, reference materials, service tag information,and Dell contact informationLCD control panelThe M1000e chassis enclosure LCD control panel is located on the front of the M1000e chassis toprovide user access to buttons, display, and I/O interfaces. For more information on the M1000eLCD control panel, see theDell PowerEdge Modular Systems Hardware Owner's Manual onDell.com/Support/Manuals.Quick Resource LocatorA useful feature included with Dell PowerEdge 12th generation servers is the Quick Resource Locator(QRL) — a model-specific Quick Response (QR) code that is located on the server (see Figure 4). Useyour smartphone to access the Dell QRL application to learn more about the server.