Once my Keen arrived in the mail, I charged it for a couple hours and was ready to go. I fiddled a bit with the settings—you can customize how sensitive the device is to your behavior, which makes it vibrate more or less often, and change the intensity and duration of each vibration.
Not sure which size is right for you?
It's important that Keen has a snug fit on your wrist. Here's a quick guide to help you decide which bracelet size to order:
Small/Medium
Fits kids and adults with small-medium wrists
min: 5.25 inches (13.3 cm)
max: 7.50 inches (19.0 cm)
Medium/Large
Fits adults with medium-large wrists
min: 6.15 inches (15.6 cm)
max: 8.50 inches (21.6 cm)
Small/Medium
Fits kids and adults with small-medium wrists
min: 5.1 inches (13.0 cm)
max: 6.8 inches (17.2 cm)
Medium/Large
Fits adults with medium-large wrists
min: 6.3 inches (16.0 cm)
max: 8.2 inches (20.8 cm)