• Country
• Japan

• Manufacturer / Brand
• Sony Corporation; Tokyo

• Year
• 2003

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 202394

• Wave bands
• - without

• Power type and voltage
• Batteries / addl. power jack / 2 × 1,5 / 9 Volt

• Loudspeaker
• - Is a Headphone or Earphone

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Wireless Stereo Headphones MDR-RF820 RK - Sony Corporation; Tokyo

• Notes
• 20- 20 000 Hz; 863,5 - 864,5 MHz; Ch1, Ch2, Ch3. The transmitter of MDR-RF820 and RF850 same machine, TMR-RF850 R. Difference is only in the headphones!

• Net weight (2.2 lb = 1 kg)
• 0.270 kg / 0 lb 9.5 oz (0.595 lb)

• 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 3967 models, 3820 with images and 954 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sony Corporation; Tokyo