Sony MDR-IF230

Replacement headphones for the Sony MDR-IF330RK and MDR-IF230RK; works with your existing transmitter
Second pair of headphones for the Sony MDR-IF330RK and MDR-IF230RK; enables two people to listen at the same time
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
Light weight so you can wear them comfortably for hours on end
Open-air design lets you continue to hear ambient 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
Up to 100 hours of battery life with optional AA alkaline battery
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 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
Infrared wavelength 880nm
Infrared Modulation Frequency modulation
Infrared Carrier Frequencies Right 2.8MHz, Left 2.3MHz
Transmitter Sony MDR-IF330RK or MDR-IF230RK
Type Open-air, Dynamic, Cordless
Drive Unit 30mm
Diaphragm PET
Magnet Ferrite
Frequency Response 18 - 22,000Hz
Power Requirements DC 1.5V, 1 AA battery (optional)
Battery Life Approx. 100 hours with optional alkaline battery
Headband Wide, Self-adjusting
Power On/Off Automatic switch
Volume Control One