Built-in high-precision temperature sensor to monitor body temperature throughout the day. When the measured temperature exceeds 37.3 degrees Celsius, the bracelet displays the current temperature, vibrates, and activates the indicator light in green, yellow, or red. Supports time and date display and stopwatch function. Vibration alarm can be set for two separate alarms. 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: 3045 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 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.) Note: 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