⚫︎ New and unused. [Bluetooth 5.3 Calling Function & Message Notifications] Adopting the industry's most advanced Bluetooth 5.3, it significantly improves communication issues of conventional smartwatches, greatly enhancing battery life, communication speed, communication range, and connection stability, while also strengthening energy efficiency. Easily pairs with Android 4.4/iOS 9.0 system smartphones. By connecting to the dedicated app "Dafit," you can make Bluetooth calls even if your mobile phone is in your pocket or bag. You can synchronize phone contacts and view call history. Furthermore, you will be notified of Line, Facebook, Twitter, etc., so you won't miss important information or calls. *Note: To use the calling and music playback functions, you need to pair with the audio Bluetooth "H27". [IP67 Waterproof & 400 mAh Durable Battery] The XIWEIYI smartwatch has IP67 waterproof and dustproof performance, capable of handling daily rain, sweat, and splashes. It has a built-in 400 mAh large-capacity battery, which can be used for 5-7 days with just 1.5-2 hours of charging, and the standby time can reach up to 25-30 days. This eliminates the hassle of frequent charging (*Battery consumption varies depending on usage frequency, usage patterns, etc.). [1.43 High-Definition Color Screen & Sophisticated Design] The 3D high-definition screen using industry-leading TFT material application features a vivid texture achieved through CNC cutting technology, and a distinctive watch bezel design that highlights brilliance and depth, with delicate lines being attractive. Compared to traditional smartwatches, the image quality is clearer and the resolution is higher (466*466PPi). With its smooth touchscreen, sophisticated design, and excellent functionality, this is a masterpiece that we highly recommend. [100+ Sports Modes & Custom Watch Faces] The sports watch has various sports modes such as walking, running, cycling, climbing, soccer, yoga, etc. You can set training times in the app "Dafit," and in addition to the watch faces equipped on the smartwatch itself, you can also download watch faces from the dedicated app "Dafit." Smartwatch equipped with AMOLED display, comes with replacement bands and tools. Thank you for viewing.