Fitness Tracker Watch with Blood Pressure and Heart Rate Monitor. Comprehensive Wellness Tracking. Tracks heart rate, steps, blood pressure, and sleep quality. Sedentary reminder alerts you if you?ve been sitting for too long. Smartphone Connectivity. Pairs with your smartphone via Bluetooth. Displays incoming calls, messages, and other notifications. Bluetooth version: 4.0. Multi-Day Battery Life. Built-in rechargeable 70mAh lithium-polymer battery. Battery life: up to 4 days. Charging time: 90 minutes. Specifications. 0.87 inch OLED display. RAM: 32KB. ROML 256KB. Weight: 0.35lb. Product dimensions: 8 inch (diameter) x 2 inch (W).