Great Battery Life and Wide Compatibility: Our smart watch is compatible with iOS 9.0/Android OS 4.4 or above smartphones. It can be used for up to 7 days and standby for 30+ days after fully charged. 1.4 Inch Full-touch Screen & Custom Watch Face: The watch with 1.4 inch LCD screen can provide you with high-quality touch and visual experience. Five levels of brightness options allow you to easily read information in the sun or dark. Also you can choose a picture you like to customize the watch face on HeroBand III. (Wristband Size: 5.85 - 8.78 inch). Notifications and More Practical Features: All messages and notifications will show on your wrist and remind you through vibration. It cannot answer call or text on watch. There are also many convenient functions like Timer, Wake-up Gesture, Find Phone, Sedentary Reminder, Music Control and Weather Display. Sleep and Blood Oxygen Saturation: The Tracker can monitor your Heart Rate, Blood Pressure, Blood Oxygen (SpO2) and your deep, light sleep state which can help you better understand your health. (NOTE: the data cannot be used as a medical-grade test). All-day Activity Tracking: This smart watch has 7 kinds of sports modes (Walking, Running, Cycling, Skipping, Badminton, Basketball, Football). The watch display shows your accurate steps, distance, calories, active minutes and you can see more detailed data on App.Compatible Devices: Smartphone. Age Range (Description): Adult. Target Audience: Teens, adults, parents. Shape: Rectangular. Special Feature: Time Display,Notifications,Heart Rate Monitor,Blood Pressure Monitor,Sedentary Reminder,Sleep Monitor,Pedometer,Oxymeter. Screen Size: 1.4 Inches. Color: Purple. Style: Modern. Model Name: P22. Brand: KALINCO. Country of Origin: China. Manufacturer: KALINCO. Date First Available: April 14, 2021. Best Sellers Rank: #1,150 in Electronics. Customer Reviews: 4.0 out of 5 stars 18,501 ratings 4.0 out of 5 stars. Batteries: 1 Lithium Polymer batteries required. Item model number: P22. : B09BTNKMYR. Item Weight: 3.2 ounces. Product Dimensions: 0.01 x 3.54 x 0.67 inches.