• Country
• Germany

• Manufacturer / Brand
• Sennheiser Electronic (Labor W); Wennebostel

• Year
• 1995 ??

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 132926

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Wave bands
• - without

• Power type and voltage
• Storage Battery for all (e.g. for car radios and amateur radios) / 2,4 Volt

• Loudspeaker
• - only for Earphone!

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Kopfhörer Infrared RI 300 - Sennheiser Electronic Labor W;

• Notes
• Infrarot-Kopfhörer RI300. Sender TI300. Netzanschlussadapter. Batterie BA 151(2,4 V). Produced in Ireland, but still a German brand.

• Source of data
• - - Data from my own collection

• Author
• Model page created by Sándor Selyem-Tóth. See "Data change" for further contributors.

• Other Models

• Here you find 295 models, 280 with images and 135 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sennheiser Electronic (Labor W); Wennebostel