HP Q2439A Duplexer for Laserjet 4200, 4300

Great, works excellent!!!

It works great and is so clean that it does look like new. Being able to print on both sides really saves on paper consumption. It is easy to install and user friendly. Just take out the cover and this slides right in. The only issue was in having to buy a right angle power cord but worth it.

So far can't use because I don't know how to print sided. I am checking with office equipment company. I installed it, but it is not showing any option to double-side print. Trying to search the internet too.

Works like a charm. So glad I didn't have to pay twice as much buying at full retail price.

Fantastic. should have had this all along. Saves mountains of paper.

The product arrived perfectly boxed and packed in excellent condition and works great future plans to purchase another for additional hardware great deal

Works Just Fine!

added to second hand 4200 and works perfectly