National Geographic Terrarium-Mountable Digital Reptile Thermometer This Thermometer has a convenient LCD display, Spare Battery Box and Switch to convert between F and C Temperatures Measures temperature from 14F to120F (-10C to 48.8C) Includes 2 Batteries, 1.5 Volt AG10/LR1130 Mounting Fixture included for secure placement Monitors habitat, so your reptile is comfortable