Fitbit alta hr
Comes with extra wrist bands with free cost of cost(each one costs from $25 to $60) In excellent condition. The Fitbit Alta HR is a customisable heart rate fitness wristband with 7 days battery life. Featuring continuous and automatic PurePulse heart rate and auto sleep tracking. The Sleep Stages tracking function let you measure your sleep in light, deep and REM periods to better understand your sleep quality. Connects seamlessly with Fitbit app on your mobile phone.