Activity Tracker and Sleep Monitor Fitness Wristband Watch &ndash; Wearable Waterproof Bracelet Tracks Health Calories + Steps High Quality Anodized Aluminum Cell with 12 LEDs - Tap to Display the Time and Your Current Step Progress Toward your Daily Fitness Goal No Need to Charge! Replaceable Battery Lasts up to 4 Months and Ensures Uninterrupted Tracking at Night When Other Trackers Need to Go to Sleep Live a Healthier Life Style - Sync Wirelessly with The Apple Android Mobile App and Track your Calories Burned and Restful Sleep Earned - Monitor Improvement Over Time The High Quality Armband Bracelet Fits Comfortably and Securely on 6.25" to 9 Wrists - Holds the Cell Tight in its Deep Groves So It Doesnt get Lost The High Quality Armband Bracelet Fits Comfortably and Securely on 6.25" to 9 Wrists - Holds the Cell Tight in its Deep Groves So It Doesnt get Lost