Each Longtail Duo is shipped together with a user manual written in English. The latest version of user manuals in English, German, Dutch, French, Italian, Spanish and Danish can be found below.
| Product | Language | Download |
| Longtail Duo | English | |
| Longtail Duo | Deutsch | |
| Longtail Duo | Español | |
| Longtail Duo | Français | |
| Longtail Duo | Italiano | |
| Longtail Duo | Nederlands | |
| Longtail Duo | Dansk |