3.73cm (1.47") Large AMOLED Touch Display with Multiple Personalised Watch Faces; SpO2 Blood Oxygen Tracker - It Tracks Oxygen Saturation Level in Your Bloodstream Health Monitors - 24/7 Heart Rate Monitor, Intelligent Sleep Monitor & Stress Monitor, 10 Professional Workouts with 6 Auto Detection Modes 10 Professional Workouts with 6 Auto Detection Workouts that Provides Professional fitness data Notifications alert , Caller ID, SMS, Emails, Weather Reports, Calendar, Social Apps, and Incoming Call Rejection Operating System: Android Wear 2.9; Band Material Type: Silicone; Clasp Type: Tang Buckle; Human Interface Input: Touch Screenbuttons; Compatible Devices: Smartphonetablet; Item Type Name: Smart Band; Connectivity Technology: Bluetooth