Stand out features 1.39 HD AMOLED DisplayThe large AMOLED high-definition Screen is clear and vivid with different watch faces and widgets to choose from. Sleep Quality MonitoringWith in-depth sleep monitoring accurately determine your sleep stages monitor sleep breathing and provide quality analysis for improved sleep. Stress Level MeasurementCalm yourself when feeling overwhelmed check your personal stress level anytime you feel pressured though the day. 5 ATM Water-resistanceWith a water resistance of 50 meters you can wear your watch worry-free for daily use or while you swim. Key features 3D Curved Bezel-less Design24/7 Heart Rate MonitoringBlood Oxygen MonitoringSleep Tracking Music Storage and; PlaybackUltra Long Battery Life 24 Hour Heart Rate MonitoringThe GTR 2 can perform 24-hour heart rate monitoring. It covers heart rate zones and provides a warning when your resting heart rate is abnormally elevated keeping you aware.Blood-oxygen Saturation MeasurementThe blood-oxygen saturation measurement function keeps you on top of your health. When engaged in long-term mental or physical activity measure your oxygen level to keep your health in your hands. 90 Built-in Sports ModesActivate one of the sports modes you need and after the exercise see your corresponding analytical report of your workout. Intelligent recognition of sports modes also eliminates the need to manually select the sports mode.Extended Battery LifePowered for maximum performance with a 417mAh battery the GTR 2 has a battery life of up to 11 days with typical use and 6 days with heavy usage. . . Music Storage and; PlaybackA massive 3GB of local music storage space enough to transfer 300-600 of your favourite songs to the watch through your mobile phone. Talk To and; Though Your WatchGTR 2 includes a microphone and speaker to let you answer calls on your watch when it’s inconvenient to pick up your mobile phone. Connect the GTR 2 to your mobile phone via Bluetooth to ensure that you no longer miss important calls.