Displaying a label from a custom attribute in the Front end

Hello,
How can I display a label from an attribute defined in the BE ? What's the string i have to write into my template (iso_reader_default)

Code:

---

<div class="description"><h2 class="bottom_ruler">Fiche technique</h2><?php echo $this->tech_info; ?></div>

---

I just want to get the label from the tech_info internal name :?

Thanks