SallyBestMultifunctional 4 in 1 Universal Auto 12V / 24V LED Backlight Display Digital Car Thermometer / Car Battery Voltmeter / Noctilucous Clock / Freeze Alert

First product sent has an issue but once seller was contacted he take care the problem immediately. Replacement item works great and don't have any issue any more. I can now see the large illuminated clock with both indoor and outdoor temperate as well the vehicle voltage. The main reason I get this product is to be able to see outdoor temp as my old one was broken. This one work much better as I can see the temperature both during the day and night. Very easy to install.

I was most interested in this unit because I was looking for external temp reads while driving in my Truck. Hooking up the unit and routing wires was rather tedious only to find no matter where I positioned the external temp sensor the readings where not even close to the actual outside air temp after running the truck for 5min or more.

I now own 3 of these, and truly impressed. Time of day holds in memory if unplugged....Alternator voltage output accurate....inside and outside temps questionable.

Nice unit for my RV. I prefer the red vesus green as it is easer to see from a distance, switch selectable. I was able to run the external temp sensor out through the slide.

It works great when it chooses to. Several times I've had to reset clock several daily after replacing batteries. Not very impressed with the clock overall.UPDATE: company still has not done anything to fix this problem.

Works great in my RV, but there is no way to shut off the freeze alarm on the outside sensor, except to keep it inside. .

just doesnt work... resets every time you turn on and off the car. just... not good.

Perfect and as advertized- temp C/F reverts backs to C occasionally, however not difficult t I reset to F