• Compact, lightweight, foldable design makes for easy toting on trips
• Designed with separation between speaker cabinets for optimal stereo sound
• Mega Bass powers a full low end at any volume level
• Neodymium magnets produce high energy, accurate speaker output
• 2-way power allows use with 4 optional AA batteries or by plugging in with optional AC-E60HG AC adapter

SONY SRS-T57 -- Add these Travel Speakers to your personal CD or cassette player and hear great stereo sound penetrate your room. Also works passively without batteries or external power Driver units - 1-1/3 inch diameter cones 8 Ohms impedance Frequency response - 100 Hz to 20,000Hz Stereo mini-jack input Convenient, pocket-size Dimensions (Open) - 3-3/8H x 8-7/8W x 2-1/4D

These speakers are very lightweight and much smaller than I thought but the sound that comes out is surprisingly loud even though it doesn't have the base sound to it. It also sounds very good without that tinny sound you sometimes hear.

This speaker could be the best portable speaker I ever used. I have traveled from Japan to Europe through Mid-East, spent 2 years on the way.
The music is needed wherever I go and this speaker was my partner on the trip.
The sound is incredibly good from the size of the body, and this is so compact to carry. During the travel, I didnt see a lot of trouble of the quality and work so long; doesnt seem to get broken so easily.

The sound can be so loud as this has 2w; 2w is really huge output for portable speaker. You will not find any portable speaker as louder as this is. Of course, batteries only last a couple of hours, but that is because this creates a loud sound.

Hope this helps you

I am very happy with this product. The sound is quite good for a small unit running on batteries. Even with the sound turned on quite loud, it doesn't distort the sound much at all.
Very happy.

Sound quality is pretty good. The design is unacceptable imo. Battery door keeps popping open. There's no place for the wire to retract when not in use. It takes 4 AA batteries and it should be bundled with an AC adaptor.

These have worked for years, enduring transatlantic trips to Ireland and England. Very rugged, great sound even though you can't separate the speakers. Take 4 AA's. Looses a star because the wire does not fold or wrap neatly anywhere, hangs loose!! Come on Sony, it's the small cleaver details that keeps your products on top.