Wireless Headphones RR-840

• Country
• Germany

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

• Year
• 2005 ?

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 354101

• Picture
• Schematics

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Click on the schematic thumbnail to request the schematic as a free document.

• 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) / LiPo: BA 300, 1 x 3.7 Volt

• Loudspeaker
• - Is a Headphone or Earphone

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Wireless Headphones RR-840 - Sennheiser Electronic Labor W;

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

• Dimensions (WHD)
• 240 x 128 x 26 mm / 9.4 x 5 x 1 inch

• Notes

• Frequency range, channels: 863.3, 860.0 and 864.7 MHz

  Rechargeable Lithium-Polymer-battery (LiPo) 3.7 V, 150 mAh, 0.6 Wh

• Net weight (2.2 lb = 1 kg)
• 0.068 kg / 0 lb 2.4 oz (0.15 lb)

• Source of data
• -- Original prospect or advert

• Mentioned in
• -- Original-techn. papers.

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

• Other Models

• Here you find 293 models, 278 with images and 134 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sennheiser Electronic (Labor W); Wennebostel