Instructions and EMERs available from the VMARS group here:
http://www.vmarsmanuals.co.uk/archive/files_index.htm
The radio itself has the power supply built in. It only needs 6 VDC to power the vibrator.
The aerial looks much like an automotive telescoping whip. It has the lead-in built in and attaches to the vehicle body at two points.
I can post a photo of mine if you need it.