Specifications: Built-in high-precision temperature sensor, which can monitor your body temperature all day. When the measured temperature is above 37.3 degrees Celsius, this bracelet will display the current temperature and vibrate, and the indicator light will show green, yellow, or red. Supports time and date display and stopwatch function. The vibration alarm clock can set two groups of alarms. Built-in rechargeable battery; can work for 30 days 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 Prompt 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 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. Please allow slight dimensional variations due to manual measurement. Package Includes: 1 x Smart Bracelet 1 x User Manual