Ah yes, the 2-in-1. It's a unit that's just the speed controls for the main and tail motors and it's a mixer for the two speed controls. It does not include a receiver or a gyro, which is what the 4-in-1 which is included with the stock Blade CP has. The 2-in-1 is designed to be used with an aftermarket radio system and gyro, so you plug the gyro into it and plug it into the radio system and you're good to go. You can see what it looks like here. It's smaller and much thinner than the 4-in-1, of course, but in the end you get more weight because of the gyro and the receiver, although it's not that much. The radio is a computerized 6-channel radio, the JR XP6102. Very good price I believe, and it has a ton of features that you'd only find on radios that cost upwards of $500. And you can see what that looks like here.

And congratulations on your successful hovering! Stay patient and careful and keep working at it and soon you'll be doing forward flight easily. Helis get so much more fun once you realize that you CAN learn how to fly them.