Works with Alta HR and Alta trackers. Available sizes S-M (5.5-6.5) M-L (6.5-7.5) and L-XL (7.5-9) inches (circumference of your wrist) The band for the Alta fitness tracker is made from quality stainless steel. How it works: We engineered a fashionable way to securely wear your Alta tracker perfectly within a beautiful bracelet! Rather than wearing the rubber band that comes with your tracker, simply use this elegant bracelet to dress up your look! Ideal to wear on just about any occasion - dates, parties, to the office or any other event! Highlights:? Available sizes S-M (5.5-6.5) M-L (6.5-7.5) and L-XL (7.5-9) inches (circumference of your wrist) Easy to connect the band to the activity tracker! Indicator lamps are always visible Don't ruin your professional or dressy outfit with a plastic wristband Beautiful design & high quality NOTE: DEVICE NOT INCLUDED.