This model# 00799 outdoor window thermometer by Acu-Rite has a suction cup for easy attachment to a window or glass door. The temperature range is -4 deg. to 158 deg.F It requires 1 L1154 cel battery (included).
ACCU-RITE INDOOR/OUTDOOR THERMOMETER
Indoor/Outdoor temperature reading.
-4 to 158F.
Easy to read to read LCD display.
Strong suction cup clings to window.