Material: Rubber. Design: Round. Fastening: Buckle. Alarm, Digital Display, Fitness Tracker, Monitors Heart Rate, Monitors Sleep Quality, Step Counter, Tracks Physical Activity, Weather Forecast Display. Call and Answer Function, Dual Compatibility, HD, Heart Rate Sensors, Multiple Sport Modes, Music Controls, Rechargable Battery, Social Media Notifications. Battery Life (Approx): 9hrs. Aids Sleep, Helps Maintain a Healthy Heart. Ref: UTGT15000