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This review is from: SYBA SY-ADA23012 USB 2.0 Bluetooth 2.0 + EDR Dongle, CSR Chipset
Pros: None anymore. These used to be cheaper than the higher quality ones but now they are so close in price there is no reason to purchase this cheap poor performing device.
Cons: For context of my review, I am familiar with the background technology that runs these devices.
This adapter has very low transmit power. I measured it compared to 3 other adapters and it's less than half with some test equipment.
Low transmit power is not a problem if you're going to just be transferring files back and fourth to your phone while your computer is on your desk. It will make no difference really do to the low technical requirements of such an activity.
However, if you are wanting the following:
*A2DP (Wireless Stereo Sound) - high quality, standard, or even low.
*To use this adapter with a bluetooth device that is ~10 feet away or greater.
*Large file transfers
You will see very poor performance from this device.
The amount of signal bandwidth you have (how many bits of stuff you can send at a time) is directly related to how much power (vs noise) your signal has. This means that if you are trying to, in my example, use the A2DP profile to wireles
Other Thoughts: music you will have very poor performance (choppiness, stuttering, unlistenable) on high quality audio (needs lot of bits) and mediocre perf on low quality audio (more of the same but reduced severity.
This device has such low transmit power that transmitting data to a device that is 10 feet away even on the lowest quality setting is easily interrupted by standing between the two, or placing an office chair, or pretty much anything in their line of sight. Terrible performance.
Also, there are no Win7 driver support except the lackluster Win7 built-in driver - which is *extremely* feature limited. The Toshiba bluetooth driver works well but you wouldn't know that from anything here and again performance is still poor because the device hardware is mediocre.
Spare yourself. Pick up a higher quality bluetooth dongle for a couple bucks more and save hours of frustration and guessing. Avoid this style/brand in the future.