AlterLock CycleGuardService

About the device settings

Try to set up the AlterLock device close to the device.

If you are using an AlterLock device (1st generation), please click here for more information.


You can set whether or not the AlterLock device will sound an alarm when motion is detected.
The setting of the alarm is linked to the setting of the first warning sound.

It’s recommended you turn the alarm off if it’s not essential—for instance, if you can get to your bike immediately should someone interfere with it. Even if you do turn the alarm off, notifications and tracking will still work.
Note: If you only want to turn off notifications, go to the Control tab on the main screen and turn off Notification.

Initial warning tone

Set whether or not to emit a low-volume warning sound the first time the AlterLock device detects your bike is being moved after Lock mode has been turned on.
If you turn this off, the alarm will sound at maximum volume as soon as movement is detected.

It’s recommended you turn it on if you’ve left your bike somewhere it’s likely to be moved by an occurrence other than theft and where you don’t want a loud alarm to sound.

Alarm Duration

The duration of the audible alarm can be set to between 5 and 60 seconds in 5-second increments.

Alarm Limit

Set the maximum number of times the alarm can sound after Lock mode has been turned on and the AlterLock device detects a series of movements.
When set to 1–3 times, the alarm will only sound that number of times, after which only tracking will take place.
If set to unlimited, the alarm will sound whenever the device detects your bike being moved.

If you prefer tracking rather than being alerted by an alarm if your bike is stolen, turn it on.

Alarm Off Automatically

If it’s on, the alarm will automatically turn off if your phone's battery falls below 10%. It will automatically turn back on when the battery returns to 50% or more.

If your smartphone’s battery is exhausted, you won’t be able to turn Lock mode on or off, so it’s recommended that you leave it on.
Note 1: If you’ve manually turned the alarm off, it won’t automatically turn back on.
Note 2: This function works only when your smartphone is connected to the AlterLock device over Bluetooth.

Periodic Transmission Interval

Set the interval during which periodic transmissions are enabled on the main screen.

Periodic transmissions shouldn’t be permanently enabled as this will rapidly drain the battery and reduce uptime.
If the device is to be switched on for a longer period of time, it is recommended that it is set to 180 minutes or more in order to extend the device's operating time.

Low-Battery Notification

Your smartphone will receive a notification when the battery in your AlterLock device is low.

Note: Low-battery notifications are only available when your smartphone is connected to the AlterLock device over Bluetooth.

System sound

You can turn the system sound on and off when locking and unlocking. The system sound will be played once when locked and twice when unlocked.

*Regardless of this setting, the system sound will be played when the AlterLock device is locked and unlocked by the buttons.

Button Operating Range

Re-adjusts the operational range of the AlterLock device's button to lock and unlock.
Tap "Adjust", then place the smartphone and AlterLock device 50cm to 1m apart and tap "OK".

*Locking/unlocking by button on the AlterLock device will work when there is a Bluetooth connection with the smartphone and the signal strength is above the set value.
The Bluetooth signal strength will vary depending on the conditions such as indoor or outdoor. Please adjust the signal strength in your actual environment to check.
If you wish to disable this function, please adjust the AlterLock device in close contact with it to minimize the button's operating range.

Release Device

It’s possible to release the AlterLock device registered to your smartphone.
The released device can be used again by re-registering it.

Note: If connection to the AlterLock device is disabled, you can tap Forced Release.
Since the device may not be behave as expected if you use forced release, use it only in exceptional circumstances.

Device Information

The device ID and firmware version will be displayed.

It is possible to update the firmware to the latest version or reinstall the firmware.
Updating or reinstalling the firmware does not reset the settings.
Updating the firmware takes about a minute on iOS and about two minutes on Android.

*Please make sure to perform the firmware update with USB power supply and with the LED lit red or blue.
If the firmware update fails and you are unable to reconnect, please press and hold the button on the AlterLock device for at least 10 seconds and try again.