Xiaomi Watch S4 Smartwatch (CN version)

The Xiaomi Watch S4 is a sophisticated smartwatch featuring a 47mm round display, advanced health tracking including heart rate and blood oxygen monitoring, and 5ATM water resistance. It supports NFC for public transport and access control, Bluetooth calling, and boasts up to 15 days of battery life. Powered by Surge OS 2, it also offers special integration as a car key for Xiaomi SU7 vehicles. (CN version)

Heart rate monitoring: Optical monitoring Dial shape: Round water proof: 5ATM Blood oxygen monitoring: Manual measurement speaker: Built-in speakers Product Weight: 44.5g Call Type: Bluetooth answering Bluetooth version: Bluetooth 5.2 Certified Model: MTSB22XUN Crystal material: Plexiglas App Installation: not support NFC function: NFC access card Dial size: 47mm Host model: Xiaomi Watch S4 Product Size: 12mm high Standard battery life: 15 days