• Country
• Germany

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

• Year
• 1996 ?

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 155653

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Wave bands
• Wave Bands given in the notes.

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

• Loudspeaker
• 2 Loudspeakers

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Cordless Infra-Red Headphones RI810 - Sennheiser Electronic Labor W;

• Shape
• Portable set > 8 inch (also usable without mains)

• Dimensions (WHD)
• 230 x 125 x 25 mm / 9.1 x 4.9 x 1 inch

• Notes
• 2,3/2,38 MHz. 40-15 000 Hz. Weight: 51 g.
  Transmitter: TI 810, Range: 12 m, Covered Area: 60 m2, Dimensions: 150×150×47 mm. 24 VDC. Net weight: 94 g. Produced in Ireland, but still a German brand.

• Net weight (2.2 lb = 1 kg)
• 0.051 kg / 0 lb 1.8 oz (0.112 lb)

• Source of data
• -- Original prospect or advert

• 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