La Crosse Technology 308-1415 Wireless Thermometer, Black Multiple color LCD Full calendar display: weekday mode or calendar date (month, day, year) Wireless outdoor temperature (F/C) with range: -20 F (using alkaline batteries) up to 140 F (reads down to -40 F using lithium) Monitors indoor temperature with trends and daily hi & low records Does not include batteries (Requires 4 AA)