Thinner and lighter body: TICWRIS RS uses a metal body to ensure the texture, while the thickness is ultra-thin, and the weight is more than 10% lighter than metal machines, which makes it really thinner and lighter. Comfort is higher. Clear visibility in the outdoor environment: TICWRIS RS uses a 1.3 inch high-resolution screen, which can provide you with a larger visual size and clearer screen resolution, allowing you to see the contents of the dial clearly in a external environment. Small Body, Big Power: TICWRIS RS uses Bluetooth BT5.0 SOC chip, combined with unique intelligent optimization algorithm to achieve ultra low power consumption. Normal use time can be as long as 10-20 days, and standby time can be as long as 50 days. Compared with similar Bluetooth BT4 .0 increased by 40%. 24 Hours Dynamic Heart Rate, Accurately Monitor Different Skin Tones: Equipped with the latest professional heart rate sensor on the market, TICWRIS RS supports more accurate test data during exercise and users' needs with different skin tones. App Offline Data Sync Lets You Roam Freely: When you don't need to hold your mobile phone when out of the race, TICWRIS RS's offline data sync feature can sync the exercise data to the cloud app after connecting the mobile app (YFit). Brand: TICWRIS Case material: matel. Strap material: silicone. Compatible systems: iOS 9.0 and Android 5.1. Touch mode: single touch screen. CPU: Realtek RTL8762CK Battery: 200mAh polymer battery. RAM + ROM: 160KB + 64MB Standby time: Standby: 50+ days Daily use: 14+ days. Display and Appearance. Screen size: 3.3 cm. Screen type: TFT Resolution: 320 x 320.