300
This device's original model, the 850, was actually little more than a two-way mobile pager when introduced in 1999.
What is the BlackBerry?
It did integrate with existing enterprise email, though. Still, 1998 was still in the era of the AOL Internet, so most consumers didn’t really have a need for a mobile email device. But it did provide corporate data access, an organizer, calendar, paging, and wireless Internet, so it was of great use to businesses who wanted a more mobile workforce.
Funny bit: The 850 actually ran on two AA batteries. Kind of unfathomable in our wireless era, right?