Specifications: Bluetooth: Version 4.2 Chipset: BK3431Q Screen: 1.3″ IPS 240 x 240 Battery: 155 mAh Li-Polymer Standby Time: Up to 10 Days Battery Life: Up to 3 Days Charge Time: 3 Hours IP Rating: IP67 Water Resistant Features and Benefits: Water and Dust Resistant Hypo-Allergenic Silicone Strap Heart Rate Monitor Multisport Monitoring Pedometer and Calorie Usage Missed Call Notification Message Notification Metal Alloy Casing Volkano Active App Works with Apple and Android Smartphones