StopWatch ¹ÒÌԡҨѺàÇÅÒ ¾ÃéÍÁ à¤Ã×èͧÇÑ´ÍسËÀÙÁÔ áÅФÇÒÁª×é¹ HW30 Digital UP/DOWN timer displays Temperature, Humidity, and Heat Index HW30 Digital UP/DOWN timer displays Temperature, Humidity, and Heat Index StopWatch ¹ÒÌԡҨѺàÇÅÒ ¾ÃéÍÁ à¤Ã×èͧÇÑ´ÍسËÀÙÁÔ áÅФÇÒÁª×é¹ HW30 Digital UP/DOWN timer displays Temperature, Humidity, and Heat Index Humidity/Thermometer Stopwatch Digital UP/DOWN timer displays Temperature, Humidity, and Heat Index User settable Heat Index alarm Stopwatch/chronograph mode with 1/100 second resolution Fastest/Slowest/Average Lap recall 99 lap counter with 30 lap/split memory 10 hour countdown timer with audible beeper warning for the last 5 seconds Programmable alarm Calendar mode displays day, month, and date Digital UP/DOWN timer displays Temperature, Humidity, and Heat Index User settable Heat Index alarm Stopwatch/chronograph mode with 1/100 second resolution Fastest/Slowest/Average Lap recall 99 lap counter with 30 lap/split memory 10 hour countdown timer with audible beeper warning for the last 5 seconds Programmable alarm Calendar mode displays day, month, and date 12 or 24 hour clock operation Complete with 39" (1m) lanyard and one 3V CR2032 battery Specifications: Timing Capacity: 9hrs, 59 mins and 59 secs Accuracy: +/-5 seconds/day Lap Memory: 30 laps Heat Index: 70 to 122 Deg. F (22 to 50 Deg. C) Temperature: 14 to 122 Deg. F (-10 to 50 Deg. C) Humidity: 1 to 99% Dimensions: 3.1x2.6x0.8" (79x66x21mm) Weight: 3oz (85g) Extech Hygrometer StopWatch Temperature Thermo-Hygrometer ¹ÒÌԡҨѺàÇÅÒ à¤Ã×èͧÇÑ´ÍسËÀÙÁÔ ¤ÇÒÁª×é¹