This is a Power Supply with multiple plugs to charge the battery when it is inside or outside of the camera
It is suitable for:

FLIR E30, E30bx
FLIR E40, E40bx
FLIR E50, E50bx
FLIR E60, E60bx

FLIR T420, T420bx
FLIR T440, T440bx
FLIR T460

FLIR T600, T600bx
FLIR T620, T620bx
FLIR T640, T640bx
FLIR T660

FLIR T1020

FLIR GF-series

Also suitable for (older) FLIR P/B/SC6xx series.