Specifications: Built-in high-precision temperature sensor for continuous body temperature monitoring. When the measured temperature exceeds 37.3 degrees Celsius, the bracelet displays the current temperature, vibrates, and shows a green, yellow, or red indicator light. 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 connect to 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 Level: IPX57 Charging Voltage: DC 5V (supports USB charging) Battery Capacity: 3.7V, 75mAh (included) Operating Environment: -10 degrees Celsius to 50 degrees Celsius Features: Temperature measurement, vibration alarm, comfortable to wear Strap Length: 240mm / 9.45 in (approx.) Strap Width: 16mm / 0.63 in (approx.) Strap Thickness: 8mm / 0.31 in (approx.) Notes: Due to differences in lighting and screen settings, the item's color may vary slightly from the images. Slight dimensional variations may occur due to manual measurement. Package Includes: 1 x Smart Bracelet, 1 x User Manual