무선 헤드폰이네요 국내 미출시 버전에 좀 저가형인것 같은데 잘 모르겠네요..

저같은 경우 막귀여서 그런지 소니 RF4000k 사용중인데 대만족입니다.

이제품은 어떨지... 일단 가격은 매우 저렴하네요..;;      

Product Details

Sony Wireless Stereo Headphone System - MDRIF240RK

Get ready to rock with Sony's MDR-IF240RK Wireless Stereo Headphones System! This complete kit which includes a Transmitter and Headphones offers features like its lightweight, open-air design, 30 mm Drive Units for deep bass, up to 60 hours of Battery Life with an optional alkaline battery or up to 35 Hours of Battery Life with the supplied NiHM Rechargeable Battery, and a Transmission Range up to 24 feet. Also utilize the Transmission Coverage Angle - up to 90°. Permitting an easy connection to your home audio system, TV or VCR, the MDR-IF240RK provides a personal entertainment experience you can move to.

Features:

• Complete Kit Including Transmitter and Headphones
  
• Lightweight, Open-Air Design
  
• 30 mm Drive Units for Deep Bass
  
• Up To 60 Hours of Battery Life (Optional Alkaline Battery)
  
• Transmission Range Up To 24 Feet
  
• Battery Is Automatically Charged By Placing Headphones On The Cradle
  
• Transmission Coverage Angle Up To 90°
  
• Easy Connection to Home Audio System, TV or VCR
  

Specifications:

• Cordless Design lets you move around the room and still enjoy music or TV sound tracks; lets you turn the volume up late at night -- without disturbing anyone else
  
• Easy Connection to TV, VCR and audio systems, through the supplied connecting cord and plug adapter
  
• Light Weight so you can wear them comfortably for hours on end
  
• Open-Air Design lets you continue to hear ambient sound
  
• High-Power Infrared Transmitter incorporates multiple Light-Emitting Diodes (LEDs) for extended coverage range
  
• 24 Foot Transmission Range for listening enjoyment throughout the room; lets you sit back from the TV set and still enjoy TV sound
  
• 30 mm Diameter Drive Units are larger than many portable headphones for deeper bass, lower distortion and wider dynamic range; frequency response extends down to a low 18 Hz
  
• Rechargeable Battery (supplied) saves repeated trips to the store; automatically recharges when you place the headphones on the supplied transmitter
  
• Up To 100 Hours of Battery Life with optional AA alkaline battery; up to 30 hours life with supplied rechargeable NiCad battery
  
• Complete Kit including high-powered transmitter/recharger, headphones, rechargeable battery, connecting cable, UniMatch(r) plug adapter and AC power adapter
  
• 90° Transmission Angle (maximum) for uninterrupted listening as you move around the room
  
• PET Diaphragms ensure high rigidity for minimum distortion; low mass for extended high-frequency response out to 22,000 Hz
• Ferrite Magnets combine high energy and small size, for ample sound output
  
• Wide Headband with a separate self-adjusting band conforms precisely to the curve of your head; stays comfortable, even after listening for hours on end
  
• Mute Function to avoid noise through the headphones; cuts out the sound when no audio signal is available
  
• Automatic Headphones Power Switch conserves battery life; the headphones turn on when you place them on your head
  
• Single Volume Control in one earpiece conveniently adjusts the volume for both channels
  
• Supplied Connecting Cord with Sony UniMatch? plug that goes to the headphone output of your high fidelity system, TV set or VCR; UniMatch system accommodates either the phone jack on high fidelity components or the minijack found on video components
  
• Infrared Modulation: Frequency modulation
  
• Infrared Carrier Frequencies: Right 2.8MHz, Left 2.3MHz
  
• Power Requirements: AC 120V, 60Hz when used with supplied AC power adaptor, which connects to the DC 9V jack
  
• Audio Input: Stereo L/R phono plugs; supplied 3-foot connecting cord goes from stereo mini plug or phone plug to L/R phono plugs
  
• Effective Range: 24 feet (7m); 10 feet (3m) at ±45°
  
• Power On/Off: Automatic On/Off switch
  
• Headphones:
  
• Type: Open-air, Dynamic, Cordless
  
• Drive Unit: 30mm
  
• Diaphragm: PET
  
• Magnet: Ferrite
  
• Frequency Response: 18 - 22,000Hz
  
• Battery Life: Approx. 35 hours with optional NiCad battery; approx. 60 hours with optional alkaline battery
  
• Recharging Time: Approx. 24 hours
  
• Headband: Wide, Self-adjusting
  
• Power On/Off: Automatic switch
  
• Volume Control: One
  
• Supplied Accessories: Rechargeable NiCad Battery NC-AA-HJ, AC adapter, Connecting cord, UniMatch plug adapter
• Optional Accessories: Additional Headphone - MDRIF140

Approximate Weights:

• Headphones: 6.3 oz. (including battery)
• Transmitter: 4.4 oz.
• Shipping: 3 lbs.

Warranty Information:

• Manufacturer Warranty (authorized online retailer):
  
  • LABOR: For a period of ninety (90) days from the original date of purchase from SONY or its local representative supplier, SONY will repair defects in the Product at no charge, or pay the labor charges to any SONY authorized personal computer service facility. After this ninety (90) day period, you must pay for all labor charges.
  • PARTS: For a period of ninety (90) days from the original date of purchase from SONY or its local representative supplier, SONY will supply, at no charge, new or rebuilt replacement parts in exchange for defective parts of this Product. Any replacement parts will be warranted for the remainder of the original warranty period or ninety (90) days from installation by SONY's authorized personal computer service facility, whichever is longer. All exchanged parts replaced under this warranty will become the property of SONY.