# Pre-Built Quefrency Guide Script
If it's your first time getting a pre-built Quefrency keyboard, I'll walk you through the process and explain some terms. Each keyboard has additions unique to that individual keyboard, which is why there's a video for each pre-built.
### PCB Revision
For the Quefrency, we carry the Revisions 2,3, and 4. The Rev.2 uses a TRRS cable to connect the halves, while the 3 and 4 use USB-C to connect. The Rev. 4 is all hotswapped. The only soldering for it are the rotary encoders, should you choose to have those.
### Switches
We have clicky, tactile, and linear switches to choose from. If you want to send us switches to install in your board, choose the "Customer Supplied" option. If you'd like to put in your switches yourself, choose the "Self Installed" option.*
### Rotary Encoders
If you want none, one, or both, this is where you let us know what rotary encoder situation you'd like.
### Left Macro
Some folks like having the extra keys on their board to map interesting things to. Some don't. We can build it either way! Here's where you let us know which you prefer.
### Left Shift
You have the choice over a bigger shift key, or a split shift that gives you a 1.25u key and a 1u key, also known as ISO.
### Left Half Bottom Row
Choose here how your keys are arranged. Consider what size of a spacebar you might like to have.
### Backspace
If you want to have a backspace *and* delete key, go for the split backspace. If you're vibing with a larger backspace, go for the 2u variant.
### Enter Key
If you like to rock the rectangular shape, go for ANSI. But if you're an upside-down L shape kind of return key person, go for the ISO.
### Right Shift
Similar to left shift, the choice is yours as to whether or not you want a larger key or two keys.
### Right Half Bottom
It looks complicated, but this is giving you the chance to choose your arrangement of keys like the left half bottom.
### Additional Notes
If you're sending us some switches, here is a great spot to let us know and give us the tracking number! Also do email so we can make sure you have everything you need.
### USB-C to USB-C Cable
We have white and black, and both come in sizes of 30 centimeters and 1 meter or more.
*The Self-Installed option is limited to the Quefrency Rev. 4 model. :)