Active sensor Daytona for Velona speedometer.
Install the sensor next to the screw head of the brake disc rotor, driven sprocket or something that rotates as the bike runs.
It can be installed on a mounting bracket with a srew or cable ties (not provided).
Important: The stable sensing range is 1-3 mm. Keep 1-3 distance between the sensor and the screw head.
Remark: not compatible with the Smiths speedometers