The Polar Unite Fitness Watch is a waterproof device designed with advanced wrist-based heart rate and GPS. This watch can track your speed, distance and route whilst running, and keep track of your heart rate. The Polar Unite comes with superb Nightly Recharge technology which is an overnight recovery measurement that shows you how well you have recovered from the demands of your day. Polar Sleep Plus Stages sleep tracking offers you a full window to your night, it automatically tracks the amount and quality of your sleep and shows you how long you spent in each sleep stage. Serene is a guided deep breathing exercise that helps you relax your body and mind and manages stress. The FitSpark training guide offers ready-made daily on-demand workouts that match your recovery, fitness level and training history. Polar Flow is the online window to your training, activity and sleep. It works seamlessly with your Polar product and helps you track your training, analyse your progress and achieve more. Available on desktop and mobile. The colour touchscreen with 1-button interface and the handy snap & slip wristband make Polar Unite a pleasure to the eye and easy to use. Connectivity: Bluetooth Low Energy. Custom USB charging adapter for charging and data synchronization. Tech Specs: 43.4 x 43.4 x 10.4 mm, Color touch display (IPS TFT) with Ambient Light Sensor (ALS), resolution 240x204. Asahi glass lens, Weight 32g. Battery: 174 mAh Li-pol battery. Battery life up to 50 h in training mode, Water resistant 30 m (ISO 22810, suitable for swimming). In the Box: Polar Unite fitness watch, Additional wristband in a larger size, USB charging adapter, Polar Unite user manual, Information note.