↓↓↓Quoted product description Product Information 【Product Specifications】y9 ◇Color: Black ◇Compatible systems: iOS 9.0 or later, Android 4.0 or later. Also compatible with Bluetooth 4.4. ◇Wrist size for wearing: Approximately 137-215mm ◇Weight: Approximately 58.7g ※This product is not a professional medical device, so please refrain from using it for medical purposes or applications requiring precision. 【1.43-inch Full Touch Screen & Brightness Adjustment】 The 1.91-inch IPS color screen displays notifications and text on a larger, high-precision screen. Function switching is possible by swiping up, down, left, and right, significantly improving convenience. Screen-on time (can be set for a maximum of 5 minutes) and brightness adjustment are possible. 【Bluetooth 5.3 & Incoming Call/SMS Notifications】 Bluetooth 5.3 has dramatically improved stability compared to the previous 4.0. The smart bracelet (model number: y9) displays notifications from incoming calls, text messages, emails, LINE, Twitter, Facebook, and other apps, and can also delete messages. You can download various watch face screens with the dedicated app "FitCloudPro". It is also possible to use photos of family, lovers, idols, and pets as the watch face screen.