1.The Alta HR band is specially designed to compatible with Fitbit Alta and HR Tracker,tracker is not included.
2.GreenInsync Fitbit alta watch bands is made of a flexible, durable premium material,very comfortable to wear,eco-friendly and safe for the human skin.
3.The wristbands is adjustable in length: 5.5-8.1 inches wrist.
Disclaimer: Our Fitbit Alta bands are in NO WAY connected/affiliated to the Fitbit Inc. or to their trademarks "Fitbit", "Fitbit Alta", "Fitbit Alta HR", "Fitbit Flex"". We are an independent manufacturer/seller of quality replacement bands.