​​The units in this sale are being sold as open box condition. That means that they have been opened due to being a photo sample, a tested good customer return or having damaged packaging. Some non-essential items may be missing from the box. The unit may not be shipped in retail packaging. That is the reason for the reduced sale price and the reduced warranty.

• Start dynamic personalized workouts on your wrist with step-by-step coaching. Syncing range: Up to 30 feet. Certain features like smartphone notifications may require Android 5.0+. Syncs with Mac OS X 10.6 and up, iPhone 4S and later, iPad 3 gen. and later, Android 4.4 and later and Windows 10 devices
• Store and play 300+ songs, plus download playlists from Pandora
• Use built-in GPS/GLONASS to track pace, distance & routes and get Pure Pulse continuous heart rate tracking & real-time zones
• Package includes both large and small size bands for the perfect, comfortable fit for all-day & all-night wear
• Access your favorite apps for sports, weather & more and make payments on the go with a built-in NFC chip. Durable screen - corning gorilla glass 3 is tough and damage resistant
• Track runs, swims, rides, workouts, all day activity and sleep with 4+ day battery life (varies with use & other factors)
• Increased pixels & amplified brightness up to 1000 nits, Operating temperature: -4 degree to 113 degree fahrenheit, Maximum operating altitude: 30,000 feet
• Buy with confidence when your Fitbit product ‘ships from and is sold by’ the following authorized Fitbit retailers:  Amazon.com, Heart Rate Monitors USA and Clever Training. Fitbit does not guarantee the quality or authenticity of products purchased from non-authorized resellers on Amazon, and they are not eligible for warranty and replacement from Fitbit.
• The minimum and maximum circumference range between 140 - 206 millimeters
• Style # FB503GYBK