Simply recommending this on the basis of longevity of my particular unit (5yrs old) whether you use it for car purposes or as a 2 area temp measuring device, in your shed / stable etc..
1x AAA battery on mine, I anticipate the same on this unit!
Tiny unit nice to be able to stick it to quickly monitor sample temperatures, proven pretty accurate compared to my oregon scientific temp / hygro monitors.
Displays in- & outdoor temperature as well as time
With ice alarm - can be disabled
Includes outdoor sensor with 3m cable
Size (cm): H3 x W12 x D3