Question about Lenovo Precision Pen 2

It connected to my C940 without any problems, so I assume it is compatible with your device.

Can't say 100% if it's compatible. Have a look at this page: https://support.lenovo.com/us...
Here you can find the functions with different devices. I hope I can help you. Greetings Dome

I'm not sure any more. Sorry.

If I knew what C740 was I could tell you sorry