Integrator Special:: Wire Solder Feeder Controller unit
Model: YB-10ff1 Input Volt.: 1 Ø 100V
Input: 50 VA Frequency: 50, 60Hz
Mass: 4.3 Kg Year: 1996

Manufactured by Panasonic.
This is the unit that allows you to control how fast and how much solder wire is "pushed" into the soldering target area.

Panasonic Softbeam Systems and Components page