I was thinking the same thing as there seems to be one valve cap that looks like a sensor. Replaced the battery to get it to work but it doesn’t show anything on the screen. Wonder if I can buy new sensors for it?
I was thinking the same thing. Replaced the battery to check. Only one tire has what looks like a sensor attached. More research needed.Looks like a tire pressure monitor to me.
Can you ask the previous owner ?
Is there a model number or brand name on the back ??