While the Fitbit One offered the ability to track sleep by slipping the sensor into a soft,
velcro arm band, the Flex leaves the sensor permanently attached, allowing you to switch modes without removing the device at all.
Not exact matches
The
Velcro band is adjustable, so it should fit most
arm sizes.
Some durability issues over time — especially with the
Velcro, can be difficult to click on your phone's power and volume buttons while in the case, a few reviewers experienced some
arm band slippage
He'll be placed on his back, with
Velcro bands or other restraints used to keep his
arms and legs still.
The
Velcro strap helps you to alter the size of the
band as per your needs suiting
arm girth, position and angle.