Built-in high-precision temperature sensor to monitor body temperature throughout the day. When the measured temperature exceeds 37.3C, the bracelet displays the current temperature, vibrates, and shows a green, yellow, or red indicator light accordingly. Supports time and date display, as well as stopwatch functionality. Vibration alarm clock allows setting two alarm groups. Equipped with a built-in rechargeable battery; works up to 30 days 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: 0.1C (measured under the armpit) Measurement Range: 3045C Alert Method: Vibration Motor Display Screen: LED Light Waterproof Rating: IPX57 Charging Voltage: DC 5V (USB charging supported) Battery Capacity: 3.7V, 75mAh (included) Operating Environment: -10C to 50C Features: Temperature Measurement, Vibration Alarm, Comfortable 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 lighting and screen settings, the item color may vary slightly from images. Slight dimensional differences may occur due to manual measurement. Package Includes: 1 x Smart Bracelet 1 x User Manual