Varia Radar Taillight Displays Vehicle Detection While Off

As long as the Varia™ radar taillight is paired and connected to a light network on a compatible Edge® cycling computer, the radar will be active even when the light mode is set to off. This can be done by changing the light mode to standby by pressing the device key, setting the light mode to OFF using the Edge bike light menu, or by changing the light network power-up option to be on timer start (in this case, your lights will not turn on until you start your activity session, but the radar will be active and the light network will form when you power on your Edge). 

To change the light mode from your paired Edge device, see Related Content or refer to your owner's manual.