Fitbit Charge 4 Fitness Tracker - Black

Features:

• Store your data - including daily stats, sleep information, and exercise history - for 7 days. See your historical data in the Fitbit app

• Contains a vibration motor for haptic feedback on alarms, goals, notifications, reminders, and apps

• Show call, text, calendar, and app notifications from your phone to keep you informed

• Accept or reject incoming phone calls and respond directly to text messages when paired to an iPhone or Android phone

• Alarms vibrate to wake or alert you at a time you set. Set up to 8 alarms to occur once or on multiple days of the week

• Time events with the stopwatch or set a countdown timer with the Timers app on your tracker

• Continuously track a variety of stats whenever you wear it. Data automatically syncs with the Fitbit app throughout the day

• Automatically track exercise or track activity with the Exercise app to see real-time stats and a post-workout summary

• Wear to bed to automatically track basic stats about your sleep, including your time asleep, sleep stages (time spent in REM, light sleep, and deep sleep), and sleep score (the quality of your sleep)

• Includes a built-in NFC chip, which lets you use your credit and debit cards on your watch

• Built-in GPS receiver, which tracks your location during a workout

Technical Specifications:

• Small Band Size: Fits a wrist between 5.5 - 7.1 inches (140 mm - 180 mm) in circumference

• Large Band Size: Fits a wrist between 7.1 - 8.7 inches (180 mm - 220 mm) in circumference

• Sensors & Motors: Optical heart-rate tracker, Altimeter, 3-axis accelerometer, Built-in GPS receiver, Vibration motor

• Wireless Technology: Bluetooth 4.0 radio transceiver and NFC chip

• Battery: Rechargeable lithium-polymer

• Battery Life: Up to 7 days

• Charging Time: 1-2 hours (full)

• Display: PMOLED

• Band Material: Elastomer

• Housing Material: Plastic

• Operating Temperature: 14° to 104° F (-10° to 40° C)

• Water Resistance: Water resistant up to 50 meters

• Maximum Operating Altitude: 28,000 feet (8,534 m)