Specifications: Built-in high-precision temperature sensor, which can monitor body temperature. When the measured temperature is above 37.3 degrees Celsius, the bracelet displays the current temperature and vibrates, with the indicator light showing green, yellow, or red. Supports time and date display and stopwatch function. Vibration alarm clock allows setting two alarm groups. Built-in rechargeable battery provides up to 30 days of operation on a full charge. No need to pair with a mobile phone or computer software. Item Name: Smart Bracelet Case Material: ABS Strap Material: Silicone Measurement Accuracy: ±0.1 degree Celsius (measured under the armpit) Measurement Range: 30–45 degrees Celsius Alert Method: Vibration Motor Display Screen: LED Light Display Waterproof Rating: IPX57 Charging Voltage: DC 5V (supports USB charging) Battery Capacity: 3.7V, 75mAh (included) Operating Environment: -10 to 50 degrees Celsius Features: Temperature Measurement, Vibration Alarm, Comfortable to Wear Strap Length: 240mm / 9.45 inches (approx.) Strap Width: 16mm / 0.63 inch (approx.) Strap Thickness: 8mm / 0.31 inch (approx.) Notes: Due to differences in lighting and screen settings, the item's color may vary slightly from the images. Please allow slight dimensional variations due to manual measurement. Package Includes: 1 x Smart Bracelet 1 x User Manual