Garmin Vivosmart 4 Fitness Tracker with charger

Garmin Vivosmart 4 with chargerSlim, smart activity tracker blends fashionable design with chic metal accents and a bright, easy to read display.Physical size: Small: Fits wrists with a circumference of 122-188 mm. Large:Fits wrists with a circumference of 148-215 mmIncludes advanced sleep monitoring with REM sleep and can gauge blood oxygen saturation levels during the night with the wrist based Pulse Ox sensor. (Not a medical device and not intended for use in the diagnosis or monitoring of any medical condition)Fitness and health monitoring tools include estimated wrist based heart rate, all day stress tracking, Relaxation breathing timer, Vo2 Max, body battery energy monitor n moreFeatures dedicated activity timers for walks, runs, strength training, yoga, pool swims and others; Lens material: Polycarbonate. Strap material: Silicone. Compatible Devices VIRB Ultra 30 , VIRB XVIRB X and VIRB XEVIRB XEGet vibration alerts for All notifications, including calls, text messages Perfect for everyday use. supreme materials and excellent craftsmanship ensure long-lasting durability.