Write the next sentence in the following story.

How to make your wireless headset wired
Buy a dc-dc step-up step-down module.
You can find them cheaply online. You'll need a few more tools, too, listed below.

Available choices: i. The module is the part that holds the wireless headphones. Cut 1 inch (2.5 cm) off a piece of cardboard. ii. Cut 2 strips of dc-dc 7/10 inches, two 1.6 in, eight 2.5 in. 8 inch strips of dc-dc 8/11 inches make an audio output. iii. The mixer should be small enough to fit in your basic router. Cut the dc-dc step-up module to fit inside the mixer in a circular manner. iv. Cut the usb cable about 6 "-10 " from the end that plugs into your pc or console. This is where we'll connect the step-up step-down module.. The answer should be
iv.