Fitbit Alta HR Fitness Wristband Activity & Heart Monitor Gray Small FB408

Open Box - Rips To Top Of Box - Size Small Keep track of your heartbeat, daily steps, and more with this versatile Fitbit Alta HR fitness wristband. This sophisticated fitness tracker sits on your wrist, reminding you to stay active, and automatically logs your workout routine via SmartTrack technology. Connect this large black Fitbit Alta HR fitness wristband to your smart device to monitor your daily habits.Features:All-day activity tracking with continuous heart rateTrack calorie burns, and heart rate, gauge workout intensity and get a picture of your overall health without an uncomfortable chest strap.Get the power of continuous heart rate in Fitbit's slimmest design yet-all day, during workouts and beyond. Alta HR contains a Bluetooth 4.0 radio transceiver. The operating temperature is minus 10 to 45 degree CelsiusWith heart rate, you can better measure calorie burn, and use zones (Fat Burn, Cardio, and Peak) to find the right workout intensity for your goals.With sleep stages po