●This is a wearable device that notifies you in advance of the risks of extreme heat. ●Based on the results measured by the surface sensor on the main unit, this product determines heat risk and alerts you with color, sound, and vibration to protect you from the heat. ●You can also check the heat risk of your current location by pressing a button. ●It has heat resistance (compliant with JIS B7001) and vibration resistance (compliant with JIS B7001). ●The color of the light changes with temperature, allowing you to notice even slight changes. ●It notifies you of rising core body temperature in real-time at 15-second intervals. ●The silicone belt makes it easy to clean sweat stains and other dirt. Uses: Heatstroke prevention, work in extreme heat, construction sites, event venues, and as a guide for health management. ■Material: ABS, PC, Silicone (belt) ■Main unit size: 25x43x10.5mm ■Color: Black ■Battery: Lithium-ion 110mAh ■Input voltage: 5V 1A ■Charging method: USB charging (magnetic) ■Charging time: Approx. 2 hours ■Continuous use: 3.5-4 days ■Waterproof performance: IP67 ■Alert volume: 68db ■Set contents: Main unit, belt, magnetic charging cable ■Weight: Approx. 11g Quantity: 1 piece