Plugged and shows it works.

The switch on light doesn’t turn red when you plug but all the knobs are working, the measurements number are changing as you can see at the pictures.

The item HAS NOT CORD.

Please understand I am not able to test them 100% as I don’t have the skills they require.

I bought a lot of these stuff from an HVAC technician.

They were totally functional.

Sell AS IT IS.

You can check my store for the other similar items.

Thank you