SR- Q2100……………………………………………..………………………………………………………………………………………………………………………………….…………………………………………………………………………….……………………………………………..………………………………………………………………………………………………………………………………….…………………………………………………………………………….5 www.Qstarz.com5-2. Hardware FunctionHardware Function DescriptionPower Jack Take the power cable and connect it to the power jack(mini USB type) for chargingPower/Mode select Button-Press and hold for 1 sec to power On-Press and hold for 3 sec to power Off.-After power on SR-Q2100, press and hold for 1 sec toswitch between Bike/Location Back/Route Plan mode.Select/Adjust ButtonAfter power on SR-Q2100:-Press and hold for 1 sec to display functions/configureparameters.-Press and hold for 3 sec to enter Setup mode.Start/Stop/Mark/Reset ButtonAfter power on SR-Q2100:-Press and hold for 1 sec to turn log mode On/Off.-Press and hold 3 sec to enable/disable LCD backlight-Press and hold 1 sec to mark locations and resetparameters settingNOTE: The measurement value will be saved even when the device is turned off. Only afteryou reset it in Setup mode will its value be erased.