1. Health Monitoring Functions:
   • Blood Oxygen (SpO2): Uses PPG reflection method with red and infrared light.
   • Body Temperature: High-precision temperature module with ±0.2°C accuracy.
   • Heart Rate: High-precision, ultra-low-power consumption, continuous monitoring for 7×24 hours.
   • Blood Pressure: Supported (use with caution due to potential inaccuracies).
   • HRV (RRI): For emotional and psychological applications, data can be extracted via broadcast protocol or custom SDK.
   • Respiratory Rate: Supported, measured in breaths per second.
   • Activity and Sleep: Supports storage of 7 days of data for activity and sleep monitoring, 24 hours a day.
   • Automatic Time Calibration for Wristbands: Supported (no need for APP calibration, the wristband automatically obtains the time from the Bluetooth base station), available as optional software.
2. Connectivity and Additional Features:
   • SOS Function: Supported, with a long press of 5 seconds to broadcast an SOS signal to be received by the base station and responded to by the cloud platform (available in some firmware versions).
   • NFC: Supported, 13.56MHz M1.
   • Bluetooth BEACON Broadcast: Data broadcast every 300ms.
   • Bluetooth Base Station Pairing: Supports batch time calibration, display of student (employee) number, class (organization) name on the wristband screen, message pushing from the base station, and storage of up to 5 pushed messages.
3. Basic Parameters:
   • Size: 40x20x13mm (wristband body).
   • Weight: 9.4g (wristband body), 12.2g (strap).
   • Body Temperature Function Description: Surface temperature detection, high-precision dynamic heart rate detection, high thermal conductivity temperature sensor, continuous measurement and broadcast of wrist surface temperature, measurement range from 36°C to 40°C with an accuracy of ±0.2°C.
4. Hardware Parameters:
   • Chipset Supplier: NORDIC NRF52840.
   • APP: IXFIT (not for commercial use).
   • Compatible System: Android 5.0 and above, iOS 9.0 and above.
   • FLASH Memory: 512K.
   • Display: TFT IPS, 0.96 inches, 160×80 resolution, single-touch type.
5. Connection Parameters:
   • Bluetooth: Bluetooth 5.2.
6. Sensor Parameters:
   • G-Sensor: High-precision sensor with an operational power consumption of only within 100 microamps.
   • Heart Rate: High-precision heart rate module.
7. Battery Parameters:
   • Type: Polymer lithium battery.
   • Capacity: 80mAh.
   • Charging Method: Magnetic charger.
8. Other Parameters:
   • Waterproof Level: IP68.
   • Charging Time: 2 hours.
   • Battery Life: Up to 12.5 days with only Bluetooth, step counting, and temperature monitoring active; over 1 week with continuous heart rate monitoring.
9. Design and Packaging:
   • Strap Color: Black silicone or customizable (MOQ 1000PCS).
   • Material: Main body: plastic; Strap: silicone.
   • Package Size: 98x98x40mm.
   • Package Weight: 92g (including watch head, strap, and charging accessories).
   • Carton Size: 510x420x230mm.
   • Carton Weight: 10.2kg.
   • Packing Quantity: 100 units per carton.

These features indicate that the C2 smartwatch is equipped with a variety of health monitoring and connectivity options, designed for continuous and precise tracking, and is durable with an IP68 waterproof rating. The device is suitable for users who need comprehensive health monitoring and prefer a device that can be easily integrated into various systems for both personal and professional use.