Battery holder housing for the adjustable power supply of nystagmus glasses according to Dr. Blessing.
Types 521 and 522, and types 501 and 502 according to Professor Frenzel.
To allow independent (mains) operation, the Nystagmus spectacles can alternatively be powered from the DEHAG battery box.
It works with three size C LR14/AM-2 batteries (1.5 volt baby batteries).
Scope of delivery: 1 piece (batteries not included!)
