Extech HeatWatch Humidity,Temperature Stopwatch, Extech Instruments (CAT#: STEM-AIAE-0049-LKN)

Digital UP/DOWN timer displays Temperature, Humidity, and Heat Index.

Lap Memory: 30 laps
Accuracy: ± 5 seconds per day
Capacity: 9hrs, 59mins, and 59secs
Temperature measuring range: 14-122 °F (-10 to 50 °C)
Size: 3.1 in. × 2.6 in. × 0.8 in., 79x66x21 mm
Weight: 3 oz (85 g)
Battery: with 39" (1m) lanyard and one 3V CR2032 battery

User adjustable 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.