TFA spot wireless thermometer transmission of outdoor temperature via transmitter (maximum 100 meter). Indication of indoor temperature. Maximum and minimum function. Radio controlled clock with date, time zone +/- 12 hrs. Wall mounting or table standing. Temperature range: indoor -10 to +60 degree C (+14 to +140 degree F), outdoor -40 to +60 degree C (-40 to +140 degree F). 1.5 volts AA batteries included. Measures 109 width by 104 mm height by 20 mm depth.