ArmFit QUEEN automatically and record your blood oxygen and sleep data, helping you adjust yourself for a healthier lifestyle. 📞 Bluetooth Calling & Message Notifications It can connect to your mobile phone via Bluetooth, view call history on the watch, and choose to answer, reject when an incoming call comes in ⌚ Custom Watch Faces More than 100 watch faces are available in the APP. You can also customize exclusive one with your own photos. ⚙️ More functions Weather, Music control, Remote camera, Breath training, Stopwatch, Alarm, Timer, voice assistant, Brightness adjustment, Exercise records, etc. 🔋 Long Battery Life Adopting BT8959 chip, QUEEN can run more smoothly and features long standby for daily use with 300mAh battery. Parameters: ✔️ Screen: 1.32″ AMOLED Screen ✔️ Resolution: 466 * 466 ✔️ BT: 5.0 ✔️ Chip: BT8959 ✔️ Sensor: HX3918 ✔️ Compatibility: Android 5.2 and above or iOS 8.0 and above ✔️ Battery Capacity: 300mAh ✔️ Working Time: 4-12 days ✔️ Standby Time: 15-20 days ✔️ App: Fitcloudpro ☑️Language: English, Chinese, Japanese, German, French, Spanish, Arabic, Russian, Ukrainian, Russian, Portuguese Specifications: ⚈ Brand: Armfit ⚈ Model: Queen ⚈ Case Material: Alloy ⚈ Strap Material: Silicon and Metal ⚈ Color: Black ⚈ Dial Size: 41mm ⚈ Dial Thickness: 10.3mm ⚈ Strap Width: 22mm (detachable) ⚈ Item Weight: 75g / 2.4oz 📝 Note 🔘 Please read the user manual carefully before using this product. 🔘 There may be slight errors due to manual measurement. 📦 Package List ⚆ Smart Watch ⚆ Charging Cable ⚆ User Manual