Used Fitbit Smart 2 with replacement coral wrist band and removable anti scratch cover. New Charging cable also included. Comes in original box. Key Specifications: Display: AMOLED with Corning Gorilla Glass 3. Sensors: Multi-path optical heart rate sensor, cEDA sensor, accelerometer, altimeter, built-in GPS. Water Resistance: Up to 50 meters. Connectivity: Bluetooth 5.0, Wi-Fi, NFC. Battery Life: Up to 6+ days, with fast charging (12 minutes for 24 hours of battery life). Storage: 4 GB. Features: Stress Management: cEDA sensor, EDA scan app, mood logging, and stress management score. Sleep Tracking: Automatically tracks sleep stages (light, deep, REM) and provides a Sleep Score. Heart Health: 24/7 heart rate tracking, ECG app for atrial fibrillation assessment, and high/low heart rate notifications. Activity Tracking: Tracks steps, distance, calories burned, and active zone minutes. Smart Features: Notifications, call answering, quick replies (with phone nearby), and Amazon Alexa built-in.