Volkano Active-Tech Serene Series Smart WatchScreen:1.3 " IPS 240 x 240Battery: 155 mAh Li PolymerStandby Time: Up to 10 DaysBattery Life: Up to 3 DaysCharge Time: 3 HoursIP67 Water ResistantWater and Dust ResistantHypo- Allergenic Silicone StrapHeart Rate MonitorMultisport MonitoringPedometer and Calorie UsageMissed Call NotificationMessage NotificationMetal Alloy CasingVolkano Active AppWorks with Apple and Android Smartphones