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SONY Black MDR-RF985RK Audio In : Analog Phono Input (left/right), Analog Stereo Input mini jack (x1) Connector Wireless Radio Frequency Headphones

  • 10Hz-22KHz
  • Audio In : Analog Phono Input (left/right), Analog Stereo Input mini jack (x1) Connector
  • 3.28 ft. (1.0 m) Stereo connecting cable Cord Length
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Learn more about the Sony MDR-RF985RK


Wireless & Bluetooth


Wireless Type
Operating Time
Battery Charging (Approx) : 16H (to fully charge an empty battery); Battery is charged by placing MDR on TMR

Battery Life (Approx) : 18H (with fully charged supplied NiMH battery pack); 28H (with AAA type alkaline battery)

Battery Type : Rechargeable Ni-MH battery pack (supplied); AAA x2 (not supplied)

Internal Power Supply : Transmitter: Supplied AC adapter (12V,200mA)

Power Requirements : Rechargeable nickel-metal hydride battery (supplied) or commercially available (size AAA) alkaline batteries

General SPEC

Driver Unit
Frequency Response
Power Supply
5mW + 5mW
Audio In : Analog Phono Input (left/right), Analog Stereo Input mini jack (x1)
Cord Length
3.28 ft. (1.0 m) Stereo connecting cable
Headphones: Approximately 10.59 oz. (300 grams)

Including supplied batteryTransmitter: Approximately 7.7 oz. (220 grams)


Cordless Headphones
Enjoy high-fidelity sound, at home, in wireless freedom.

Long-term comfort
The easy-adjust headband allows for long-term comfort and ease-of-use.

Expressive sound
40mm drivers deliver deeper bass and audio clarity for a superior home entertainment experience.

Quality sound
Wireless radio-frequency transmission provides quality indoor transmission. (Up to approximately 150 ft)

Fast charging
Quick charging your headphones is a breeze with the secure charging system. A 3.5 hour charge will produce a full charge of approximately 25 hours. recharge function.

Other specifications
- Design : Over-the-head, Home-music/movie/games
- Diaphragm : PET
- Headband : Wide, Easy-Adjust
- Magnet : Ferrite
- Power On/Off : Power turns ON when headphones are worn; Red LED illuminates
- Type of Use : Home
- Communication : Wireless Analog 900 mHz Radio Frequency
- Headphone Type : Closed, Dynamic

- Audio Modes : Mute: Operates when RF signal is weak or not received
- Channel Selection : Select by a slide switch
- Effective Range : Approximately 150 feet (45 m)
- Transmitter : Ch1: 915.5 MHz, Ch2: 916.0 MHz, Ch3: 916.5 MHz [selective, FM Stereo
- Tuning : Manual tuning via switch on both base and headphones
- Volume Control : Yes (Rotary)

Quick Info


  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 90 days

Customer Reviews of the Sony MDR-RF985RK

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  • Robert M.
  • 11/19/2013 7:35:13 AM
  • Tech Level: High
  • Ownership: less than 1 day

1 out of 5 eggsbad lot????

Pros: I'll never know.

Cons: D.O.A. Also, it's obvious that SONY intends for this, and I suspect all their current wireless headsets, to be throw away items when the batteries die. The owner's instructions says to ask your retailer what to do when the batteries die or to take the product to a SONY store. I'm reasonably sure the retailers will also point you toward a SONY store which will undoubtedly charge you more than the headset costs to replace the batteries. The Newegg ad text mentions alkaline batteries as a potential power source. This is completely false. There are no external openings or removable panels. In the specifications list on Newegg it says the batteries are "built in". I believe this is SONY code for "not replaceable by the owner".

Other Thoughts: I've bought two of these locally and both were D.O.A. with the same problem. The chargers on both were non-functional. Maybe the retailer got a bad lot, I don't know but two picked at random, from different stores is no coincidence.

0 out of 1 people found this review helpful. Did you? Yes No

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