REED Heat Stress Stop Watch
• Measures temperature and humidity, and calculates heat index as well as dew point 
• Combines air temperature and relative humidity measurements in an attempt to determine the human-perceived equivalent temperature or "how hot it feels" • Calendar mode displays day, date and time 
• 10 hour countdown timer with audible beeper warning for the last 5 seconds • 12 or 24 hour clock operation 
• Full LCD display with LED backlight • Silent operation option • Dual power: solar panel and battery 
• 1 ATM water resistant (IPX4 rated)