Suggested Retail:$99.99. Garmin Vivosmart 4, Activity and Fitness Tracker w/ Pulse Ox and Heart Rate Monitor, Black. Slim, smart activity tracker blends fashionable design with stylish metal accents and a bright, easy to read display. Includes 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 and more. Features dedicated activity timers for walks, runs, strength training, yoga, pool swims and others; Lens material: Polycarbonate. Strap material: Silicone. Get vibration alerts for All notifications, including calls, text messages and more (text replies available for Android device users). Display resolution: 48 x 128 pixels. Battery life keeps up with you; Lasts up to 7 days (excluding pulse ox sleep tracking) and is safe for swimming and showering, too. Connect to your compatible smartphone’s GPS so you can get accurate tracking during outdoor walks and runs. . 7 DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. 7 DAY STORAGE IS ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.