41mm stainless steel case houses a 38mm, full-colour touchscreen display Silicone band has buckle clasp to ensure secure fastening YouQ Alert Monitor uses AI technology to monitor your health stats, while Power Fixes mitigate fatigue and improve alertness so you can optimize the day Heart rate sensor tracks your heart rate for better peace of mind Other built-in sensors include a gyroscope, altimeter, barometer, accelerometer, and more CZ Smart dials let you customize your watch face to display the information you find most important Connect to your iOS 13.0+ or Android 6.0+ smartphone to receive notifications to your smartwatch and answer calls via the built-in watch speaker Built-in battery offers up to 24 hours of use on one charge and recharges fully in 40 minutes