Features: WBGT (wet-bulb globe temperature) is widely used in workplaces and sports environments. Designed to monitor and manage physical activity in hot conditions to help reduce the risk of heat-related injuries. Adjustable WBGT alarm setting; when the WBGT value exceeds the threshold, the buzzer sounds and the display flashes. Three usage options: wear on the arm or mount on a tripod or wall. Four danger level indicators: Caution, Vigilance, Strict, Danger. Specifications: Color: Black and White Temperature range: 0–50°C / 32–122°F Temperature resolution: 0.1°C / 0.1°F Black Ball Temperature range: 0–80°C / 32–176°F Black Ball Temperature resolution: 0.1°C / 0.1°F Relative humidity range: Not specified Relative humidity resolution: 0.1% RH Heat Stroke Index (WBGT) range: 0–50°C / 32–122°F Heat Stroke Index (WBGT) resolution: 0.1°C / 0.1°F WBGT Temperature: IN (indoor), OUT (outdoor) Operating conditions: 0–50°C / 32–122°F, 10–90% RH Storage conditions: -10–55°C / 14–131°F, 10–90% RH Power source: 2 x 1.5V AAA batteries (not included) Item size: Approximately 117 x 59 x 45mm Packing List: 1 x WBGT Meter 1 x Arm Strap 1 x English Instruction Manual