Check the listing for details. Sky Scan TI-Plus Multi-Function Heat Index Warning System Heat/Humidity Levels. Condition: New – Open box. Listed at 119.50 USD. Sky Scan TI-Plus Multi-Function Heat Index Warning System. This is new but has been used as a demo unit. All original packaging, case, and instructions included as pictured. Free shipping to US. The SkyScan Ti-plus multi-function instrument features an easy to read arrow display showing all ranges of dangerous heat conditions. Audible warning sounds before heat index reaches critical levels. Danger icon is always present during dangerous conditions. Other functions include: accurate display of actual temperature in both Fahrenheit and Celsius, as well as relative humidity and heat index. New type automatic operation makes other models obsolete. No water, twirling or charts are necessary. Critical information is stored in memory for 24 hours and can be re-displayed.The Ti-plus also functions as a countdown timer, stopwatch and alarm.Features24 hour memory.Stopwatch & timing device to .000 seconds.Large, easy to read digital display.Ergonomic design fits in the palm of your hand.A soft carrying case (included).Includes lanyard.Displays temperature, relative humidity and heat index.Timing alarm & audible alert.Powered by a single wafer battery (included).Includes controls for a calendar (month, date, & year).Includes controls for a clock (hour, minutes, & seconds).Includes controls for an alarm clock (alarm on, alarm off, & snooze).Includes on/off controls for audible alerts.Actual Size: 4.0″H x 2.5″W x 0.5″D