Headphone Adapter & Splitter, Headphone Jack Audio & Charge Connector Splitter Calling/Charger/Music/Remote Control for iP7/7 plus/8/8 Plus/X

This device functions properly, which is notable for inexpensive bluetooth devices. It has several fatal flaws which cause me to give it 3 stars:1) The volume always starts at full blast. And you can't lower the volume until sound is playing. So for headphones this device isn't not great. It totally works, but you have to manage the initial too-loud output.2) You can't control the volume from your phone. The phone bluetooth volume control does nothing. Only the physical buttons on the device can control the volume. Combined with problem #1 this sucks.3) There is a bit of white noise in the background during playback. The output is silent when connected but not streaming from a smart phone. But when streaming talk radio, there is a noticeable hiss - it's not loud or unusable by any means, but definitely noticeable.For a car stereo application, this device is very appropriate b/c you can set the volume on the car stereo before it comes out the speakers. Also for headphones with a built in volume wheel this device would be fine.Battery life is about 4-5 hours of use, which is good. Pairing is easy.

Works great, battery lasts long 5+ hours (I never listen to audio longer then that so I don't know exactly how long this will go), tested it with pc and android no issues - makes any headphones wireless, volume in it can go up very loud, but it has vol buttons.Hold press the vol button to increase or decrease volume, short press will change tracks prev - nextPlay Pause button hold down 5+ secs to power it on / off, short press will play / pause audio, and I think quick double press does something too like enable the mic or end call.It also has a microphone for hands free talking but I have not tested that feature.There are alot of models of this device that look similar the one I am reviewing for is LinK-CZBT03Services supportedA2DP (Sink)Audio Video Remote Control ProfileAVCRP TargetHandsfree ProfileAlways remember to keep lithium battery devices charged once the battery goes to zero it will severely damage the battery, this little device has some nice protections in place though, no audio for awhile it will power off , bluetooth closes connection it will turn off....etcI still charge it after every use though, and you can use it while it charges. I think its worth the price. audio is stereo , clear, no pops or clicks audio sounds like it was plugged directly in, the only issue I ran into was sometimes it gets a delay I don't know if its my pc BT adapter (cheap CSR 4.0 dongle)or BT Stack (tried microsoft, and toshiba, so far I am having good results using the CSR Stack), or this device but I just power it down and re-power up and delay goes away so it might be something to take into consideration if you will use this to watch movies or games.Can't beat it for the price.

My wife gave me a JBL Bluetooth headset for Christmas, and I immediately liked the freedom of being wireless. However, in my 2009 Grand Cherokee, which only has an audio connection and no USB port, my iPhone was again connect with a wire. Then, it occurred to me that someone has probably invented a Bluetooth that plugs into the car radio audio outlet. After a quick search at Amazon, I ordered the A2DP Wireless Bluetooth 3.0. At $9.69 it was not much of risk to see if it actually worked, what I call a proof of concept.It works just fine, though it has a number of limitations. First, the battery life is very short, and I would estimate the actual play time at four to five hours before it needs a recharge. In case you are wondering, I've been meticulous in ensuring that the device is always turned off, when I exit the car.The only way to charge the A2DP battery is through the use of a USB port, which is inconvenient, since, in my case, it must be connect to a computer. While newer cars now have USB ports, they usually have Bluetooth built in, which makes owning the A2DP moot. I must add that the one time I used the device to answer the phone, it worked fine.The second issue is that when I turn the device on, it never connects with my iPhone. That is, I have to go into the phone's settings mode and manually connect it each time I want to use it. The JBL I mention above has always, without fail, connected. Not connecting sounds like a small issue, but it becomes somewhat annoying after a while. I've tried a number of things with the device's buttons, but no cigar, which brings up the final issue, the instruction manual.The manual was written by a person that believes he or she speaks English, but they don't. After several readings, I was able to get the gist of what the writer intended, but the manual is very incomplete. Though, I must say the JBL manual, with its IKEA-like instructions, is just as incomplete. In the end I figured out how to use the devices through trial and error.In conclusion, I like the A2DP, and as I said above, it was to verify the proof of concept. I'm now going to look for something that always connects to my phone and has perhaps at least a 16-hour service period like the JBL headphones or my Jabra SP 700 hands-free, phone device.