Sony MDR-RF4000K Specifications

MDR-RF4000K
Differences in details
40mm drivers deliver deeper bass, lower distortion and wider dynamic range.
Stay comfortable as long as you listen
A wide, self-adjusting headband distributes the headphone's weight over a wide area, reducing pressure and
improving comfort.
Listen from a distance
Radio Frequency (RF) transmission sends signals from the transmitter to the headphones, allowing high fidelity
sound reproduction. You can enjoy the accompanying reception range – up to 100 feet – even when you move
outside the line of sight of the transmission.
Battery life for extended viewing
The supplied rechargeable NiMH battery lets you enjoy up to eight hours of continuous on a single charge
slim, folding design fits snugly into the charger (included). Substituting a single AAA battery for the rechargeable
NiMH pack provides 10 hours of power.
Specifications
Audio
Distortion
Driver Unit
Effective Range
Frequency Response
Transmitter
Tuning
Volume Control
General
Design
Diaphragm
Headband
Magnet
Power On/Off
Type of Use
Hardware
Communication
Headphone Type
Inputs and Outputs
Audio In
Power
Battery Charging (Approx)
Battery Indicator
Battery Life (Approx)
1% or less (1 kHz)
40 mm
Approximately 100 feet (30 m)
10 - 22,000Hz
2.404 GHz - 2.476 GHz, GFSK
Auto Tuningon headphones
Yes (Rotary)
Over-the-head, Home-Surround Sound
PET
Wide, Self-Adjusting
Neomydium
Power turns ON when headphones are worn; Red LED illuminates
Home
Wireless Digital 2.4GHz Radio Frequency
Closed, Dynamic
Analog Phono Input (left/right), Analog Stereo Input mini jack (x1)
15 hours
Power-on LED indicator
8 hours
Wireless digital RF headphones
. The
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