Sony MDR-IF240RK Review

Sony MDR-IF240RKGo wireless with your music

Wireless signal connection for cord free and uninterruptible sound transmission.
24 ft. wireless range from the headset to the transmitter.
Light weight and durable.
Open air design.
Rechargeable battery that recharges when placed on the transmitter which acts as a dock.
90 degree transmission angle for flexible operation in any room.


Some users have reported some hiss and static type noises, but this has not been confirmed as an outstanding issue.
As with all rechargeable batteries, they become worn over time and begin to lose charge.

These headphones are reasonably priced but lack in a range for operation, therefore it is given a 3.5 rating.

Check the Amazon website here for more information on this product.


Sony MDR-IF240RK

Up to 35 hours of battery life with the supplied NiHM rechargeable battery

The Sony MDR-IF240RK infrared wireless headphones are perfect for many different situations. Unlike conventional wireless radio signals infrared cannot be interrupted by electrical or magnetic interference. However, unlike wireless radio waves, infrared can also not pass through objects and walls. Infrared headphones must operate in open sight with no obstructions between the transmitter and the headphones. The Sony
MDR-IF240RK headphones deliver crisp clear audio transmission through infrared transmission; allowing you to move freely about a room without worry of tangling or length. Perfect for listening to television late at night while others are sleeping.

They are also very useful for working out and listening to your favorite music wirelessly. If you have ever tried working out with wired headphones you are likely aware of the complications involved in using them. When you find yourself looking for a good sounding and dependable source of listening to any kind of audio, make sure you remember how nice these Sony MDR-IF240RK infrared wireless headphones are.

Where to Purchase:

Check Out the the Amazon Website Here.

Technical Info:

Cord: None (Infrared)
Headphone Type: Open-air, Dynamic
Phono Input(s): 1 (Stereo L/R phono plugs)
Power Requirements: AC 120V, 60Hz when used with supplied AC power adaptor, which connects to the DC 9V jack
Recharging Time: 24 hours (Approx.)
Driver Unit: 30mm
Effective Range: 24 ft (7m); 10 ft (3m) at ±45°
Frequency Response: 18Hz – 22,000Hz
Infrared Carrier Frequencies: Right 2.8MHz, Left 2.3MHz; (Frequency modulation)
VolDesign: Over-the-head, Home-music/movie/games
Diaphragm: PET
Headband: Wide, Self-adjusting
Magnet: Ferrite
Plug: UniMatch® Adapter
Power On/Off: Yes (Automatic On/Off switch)
Type of Use: Home
UME Control: Rotary control
MSRP 59.99$

See the Amazon website for Sony MDR-IF240RK

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