Like other customers here posting in Japanese, I discovered that these were counterfeit goods after they broke within warranty and I sent them to the Bose repair centre. And still have to pay extra to sent back a return . Update: a little too large for me. This has several hooks. We walked to the pool. All in all, a great product, while it works. This item worked as a standard memory module when seated in the motherboard. Sound quality is really good and noise cancelation is good too. Part of the peddle still does, but its not as bad. Good product, good quality, easy to install.