[Upgrade] Bluetooth CSR 4.0 APTX Music Audio Receiver Adapter for Bose Sounddock and 30Pin iPod iPhone Dock Speaker

i bought this for my bose sounddock series ii. i hear my music almost as loud as the static noise this device makes. i doubt it's my speaker since it sounds great with my ipod. i tried reinserting several times. plugged/unplugged power. the noise is just so darn persistent that it almost feels rude to get rid of it. too much hassle to return. oh well...update:I gave this one star because it initially made static noise. this morning i thought i'd try it on another speaker. it was not supported by the speaker even after i reinserted it several times. then i tried it on my bose sounddock again and suddenly, it's working good without the noise. i don't know what or how it happened but it's working good now. money not wasted after all. i would have given it five stars had it worked this good the first time.by the way, the seller saw my first review and offered me a refund. i don't think it's necessary, this bluetooth adapter is working good for me. kuddos to the seller. thank you.

I bought this transmitter for my old Logitech sound dock. The initial pairing and sound was absolutely great. However, when I powered off the speaker, the transmitter remained on and paired to my phone. After I unpaired it from the phone the transmitter shut off. When I turned the speaker on again I had to to undock and redock the transmitter to turn it back on. I ended up returning this device for a transmitter with an on/off switch which lets me leave the transmitter docked all the time. It cost a little more but was worth the convenience for me.

replacing an older bluetooth adaptor that finally gave up... this didn't one didn't work... and we started using an old iphone 4 instead, amazing, that did work.... going to send it back. not needed now.

I have been using it for a 4 or so and it works perfectly with my i-phone and kindle...I would buy it again