The Reflex Active Series 53 Smart watch allows you to stay connected with the convenience of hands-free calling, to make and receive calls directly from your watch anytime, anywhere. Personalize your watch with interchangeable dials or your own photos. The Series 53 offers a comprehensive suite of lifestyle and wellness features, including step count, heart rate monitor, blood oxygen, cycle tracking, calories, and sleep analysis. It also supports multiple sports tracking and is IP68 water resistant. An additional interchangeable soft silicone strap in grey allows you to switch colors to match your style. Download the Reflex Active Red app (compatible with Android 9.0+ and iOS 12) to explore all features. Connectivity: Bluetooth 5.2. Features a TFT touchscreen display. Battery life: up to 4 days typical usage, up to 10 days low usage, with a 3-hour charge time. Fits wrists from 125mm to 225mm. Watch dimensions: H50 x W25 x D10mm. Strap dimensions: L255 x W16 x T3mm. Weight: 40g. Health & Fitness Features: Workouts, Heart rate monitor, Sleep tracking. Tech Features: Displays weather, Music player, Smart phone notifications, GPS, Compatible with Google Play Store and Apple App Store apps. Water resistant and dust resistant. Includes 1 additional Grey strap and charger. Manufacturer's 2-year guarantee.