Fitbit Blaze Smart Fitness Watch (Black, Large) Type: Heart Rate Monitor Color: Black Size: Large ( fits 6.7 -8.1 wrist) Features: Removable Stainless Steel Frame & Bands Color Touchscreen Display Activity and Heart Rate Monitoring Smart Notifications Workout Coaching Music Control Sleep Tracking with Silent Alarms Up to 5-Day Battery Life Bluetooth Smart Wireless Connectivity Windows, Mac, iOS, & Android Compatible Battery Life: Up to 5 days App-Enabled: Yes