You can send any file type on Wire Pro up to 100 MB.

See also this video.

On Desktop:

In the conversation list:

1. Click the conversation in which you like to send a file.
2. Click File .
3. Select the file you'd like to share.
4. Click OPEN.

On mobile:

In the conversation list:

1. Tap the conversation in which you'd like to send a file.
2. Tap More .
3. Tap File .
4. Select the file you'd like to share.