Features:[Slim Body & Detachable Strap]Ultra-thin body with 10.6mm thickness fits wrist better. Skin-friendly silicone strap can be replaced easily, offering comfortable and convenient wearing experience.[Health Monitor] With high-precision sensor and algorithm, it can accurately monitor and record your heart rate, blood pressure, blood oxygen data. Let you know your health condition anytime.[Sleep Monitor] KW19 provides real-time monitoring of your sleep quality, helping you adjust yourself for a healthier lifestyle.[Fitness Activity Tracker] The activity tracker supports 7 different sports modes and it can automatically record your all-day sports data, including step, distance and calories.[Smart Reminder] After connected to the phone, it will provide synchronous display of message, call or social APP to remind you of important information.[Broad Compatibility] Support phone with BT 4.0 and widely compatible with Android 5.1 and above or iOS 9.0 and above.[More functions] Alarm clock, Stopwatch, Music control, Remote camera, Weather, Sedentary reminder, Do not disturb mode, Brightness adjustment, Lift wrist to brighten screen, etc.Parameters:Screen Size: 1.3 inchesResolution: 240 * 240pxBT: 4.0Touch-Screen: Single-TouchCompatibility: Android 5.1 and above or iOS 9.0 and aboveBattery Capacity: 140mAhWorking Time: >3 days (normal use)Standby Time: >8 daysApp:Da FitSpecifications:Model: KW19Case Material: PlasticStrap Material: SiliconeColor: Black / Blue / Pink / White (Optional)Water-Resistant Level: Life WaterproofDial Size: 50 * 45mmDial Thickness: 10.6mmStrap Width: 22mmItem Weight: 34g / 1.2ozPackage Size: 11.2 * 7.9 * 5.7cm / 4.41 * 3.11 * 2.24inPackage Weight: 85g / 3ozPackage List:1 * Smart Watch1 * Charging Cradle1 * User Manual