Track your day with the Garmin Vivofit 4: a lightweight black wristband that logs steps, distance, calories and sleep on an 88×88 pixel MIP display readable in bright light. It’s water‑resistant up to 5ATM, fits wrists 122–188 mm, weighs only 25 g, and runs for up to a year on two replaceable SR43 batteries while syncing via Bluetooth to Android or iOS.