Condition New other (see details): An item in excellent, new condition with no wear. The item may be missing ... Read more about the condition Number of Items in Set 1 Power Source Batteries Color Black Indoor/Outdoor Indoor/Outdoor Measurement System Decimal & Imperial Material Aluminum, Steel, Stainless Steel, Plastic For Operating Systems iOS, Windows, Android Brand Fitbit Department Unisex Adults Type Activity Tracker Battery Life More Than 7 Days Measurement Provided Heart Rate, Time, Distance, Calories, Speed Language German, French, English, Spanish, Italian Item Height 0 Model Fitbit One Body Area Torso, Wrist, Hand Features Distance Traveled, Alarm, Average Heart Rate, Smartphone Compatibility, Clock, Date, Chest Strap, Wristband, Set Goals, Altimeter, Sleep Tracker, Rechargeable Battery, Data Review, Exercise Log, Speedometer, Compass, Calorie Monitor, Average Speed, Cadence, Armband, Wireless, Bluetooth, Stopwatch, Water Resistant, Pedometer, Hip Clip, Heart Rate Monitor Sensors Accelerometer, Infrared Sport/Activity Running & Jogging, Swimming, Gym & Training, Yoga