Honda CLARITY Plug-In Hybrid 2020 Owner's Manual page 406

uuWhen DrivinguAdaptive Cruise Control (ACC) with Low Speed Follow
■
To Set the Vehicle Speed
On when ACC with
Low Speed Follow
begins
When driving at about 25 mph (40 km/h) or above: Take your foot off the
pedal and press the −/SET button when you reach the desired speed. The moment
you release the button, the set speed is fixed, and ACC with Low Speed Follow
begins.
When driving slower than about 25 mph (40 km/h): If the vehicle is moving
and the brake pedal is not depressed, pressing the button fixes the set speed to
about 25 mph (40 km/h) regardless of current vehicle speed. If your vehicle is
stationary, you can set the vehicle speed even with the brake pedal depressed.
404
−/SET Button
Press and release