The MEBUYZ 2 Pack Fitness Trackers work well.l. I will keep 1 fitness tracker and give the other as a gift. There is monitoring of your heart rate and sleep duration. The fitness trackers are waterproof and sweatproof. There is a pedometer for all day tracking of steps, and also tracking of distance, and calories burned. There is USB charging that gives you 7-10b days using the fitness tracker. There is an app for your smatphone that is connected with bluetooth. You can see all your information on the app on your smartphone and some of the information on your fitness tracker. #RankBoosterReview ii, #Sponssored iii, #MEBUYZ 2 Pack Fitness Tracker, https://www.amazon.com/gp/product/B07F5B8LG7/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1