YESIDO IO40 Smart watch

Display: 2.01-inch LED HD Touch Screen with a 240 × 296 resolution.

Connectivity: Bluetooth 5.1 supporting phone-free dial/answer through a built-in speaker and microphone.

Battery: 180mAh Li-Polymer battery; takes about 4 hours to charge via a magnetic suction point.

Materials: Zinc Alloy shell casing paired with comfortable, interchangeable TPU/silicone bands.

Companion App: Pairs via the XOfit app (compatible with Android 5.0+ and iOS 9.0+). 

Communication: Direct on-wrist calling, syncable contact phonebook, call history logging, and SOS emergency contact shortcut settings. It displays instant push messages from SMS, WeChat, Facebook, WhatsApp, and Twitter.

Health & Fitness Tracking: Equipped to monitor real-time heart rate, blood oxygen levels (SpO₂), blood pressure, and multi-stage sleep monitoring (deep, light, and REM sleep). It also features a daily pedometer, calorie counter, and sedentary/hydration reminders.

Utilities: Integrated with a Bluetooth camera shutter, music player controller, local weather reporting, a basic calculator, an on-device calendar, a stopwatch, a remote Siri command trigger, and a flashlight mode.