Funkwerk FT4 Operating Manual page 39

Legend (cont'd)
No. Designation
17 Side connector
18 Battery unlocking
19 Contact strip
(bottom connector)
Function
12-pin interface for connecting an optional system-com-
patible accessory, e.g. headphones/headset.
When not in use, the interface is covered up with a
special screw-on FT4 side connector cover.
To unlock the battery, pull both buttons down.
The unlocking buttons are fitted on both sides of the
battery. The locked status is depicted.
Contacts for connecting an external antenna (e.g. for
car adapters), a data interface and the charger.
Structure and function
Connections
35