• Super-light In-the-ear Headphones
• Bass Booster Earpiece Shape
• 16 mm driver units
• Acoustic Twin Turbo Circuit for enhanced sound
• High-powered Neodymium Magnets

Groove Style Bud Fontopia(R) / 16mm Drivers / Wide frequency range up to 23,000Hz / For Walkman(R) and Discman(R) Portable Stereo PET diaphragms - ensure high rigidity for minimum distortion; low mass for extended high-frequency response out to 23,000 Hz Sony Acoustic Twin Turbo(R) Circuit Frequency Response - 8 - 23,000Hz Includes Carry Pouch

These super-light, ear-bud headphones weigh a mere five grams (.18 ounces.) They are the perfect headphone for those who relish lightweight, quality headphones. The silent cap confines the music to the listener's ear and away from those in the immediate area, a plus for those using the headphones in the coffee shop or library. The earphones are also open-air, meaning they allow ambient noises to enter the ear; this translates to a safer headphones, as the listener will be aware of horns, whistles and shouts. These headphones are constructed of an anti-bacterial material for a cleaner listening experience.

The MDR-ED21LP's deliver a quality sound, even with their small size. The groove design and Bass Booster earpiece shape allows for a better fit; additionally, this system creates more bass response than conventional earpiece designs. The headphones use sixteen millimeter drive units for a deep bass and clear treble. Sony also uses neodymium magnets which provide more energy per ounce than other conventional magnets. The PET diaphragm gives the headphones a high rigidity for minimum distortion. Finally, Sony's Acoustic Twin Turbo circuit achieves high sonic output by utilizying sound chamber and duct technology. The cord is one meter long (3.3 feet) for ample range of movement. The housing is a modern, hi-tech, black and silver metallic finish. The compact carrying pouch stores the ear-buds and cord when not needed; its small size fits nicely in a purse or back pocket.

What's in the Box Sony MDR-ED21LP headphones and carrying pouch

Product Description Groove Style Bud Fontopia(R) / 16mm Drivers / Wide frequency range up to 23,000Hz / For Walkman(R) and Discman(R) Portable Stereo PET diaphragms - ensure high rigidity for minimum distortion; low mass for extended high-frequency response out to 23,000 Hz Sony Acoustic Twin Turbo(R) Circuit Frequency Response - 8 - 23,000Hz Includes Carry Pouch

I've had these for several months, and that really surprises me. The wires are thin. They feel so delicate that I'm constantly living in fear that I'll break them. Yet they still haven't snapped, so perhaps they're made better than I'd thought.
Sound quality is great for the price (I paid $16). And they fit my ears perfectly.

I bought a couple pairs of these and to be honest, I have not used them that much. But when I did, they were a bit uncomfortable for my ear. The sound was great though.

These are great headphones,but they fit strangely in your ears. I can barely keep them in when i'm walking with them. Otherwise they are amazing sounding.

You get what you pay for. Don't get these earphones unless you try them first. I haven't found a person who feels their comfortable in their ears. Sound quality is pretty good, but not nearly has good as high quality earphones like shure & zen earphones.

i was really skeptical about buying this product,after reading all the negative reviews saying that these was uncomfortable i was afraid to get them,after reading the positive reviews i wanted them even more than i didnt want them,i said at this price i should take a chance.

wow these in-ear-headphones are amazing especially if you have an audio player with an EQ(equilizer)and they are not uncomfotable at all,they actually feel great sometimes i forgot that im wearing them,it feels like the music is just comming from my head.

the way its built is amazing,it blocks out outside noise but lets in important sounds like mom calling me for dinner or the phone ringing or a car honking which is good.its made of an antirubber material that protects your ears so the sound production wont get you deff.

when listening to music r watching videos on my mp3 the sound is crisp and clear that in a movie i can hear the wind sound in the background or the characters whisper,this does not comes with rubber sizes like the regular earbuds that gets lost al the time,but these just sit comfortably in the ear canal and its so light you wont know its there.

for you runners out there this is the real deal,take it from someone thats running at the university level,i use them for both distance and sprinting(wearing them through the back of my shirt)so go ahead stop feeling skeptical becase i know you are,it will fit i know your ears arent weired shaped like the others,try it....at this price you wont lose.SONY