Strand Smart watch connects via blue tooth connection with Apple and Android devices. Features include: Body Temperature monitoring Heart Rate Monitor Customizable dial Sleep monitor Stopwatch Alarm Step counter, Alarm Breathing Guide Music Control Calorie burn counter distance covered Comes with free downloadable application to monitor your progress called HitFit Pro 5 sport modes calorie burn counter 1.4" TFT 240x240 screen Full touch 2.5D glass RAM / Rom - 128KB / 64 MB Case - ABS + PC One Piece Waterproof - IP68 Battery - Lithium-ion 3.7V 160mAh Battery longevity - 5-7 days working time. 10-15 days standby time Charging time - 2 hours App name - Hitfit Pro Supports - Android 5.1 / iOS 9.0 and up Languages - English, German, Russian, Spanish, Portuguese, French, Italian, Polish