I was looking at a Bluetooth option to connect to my phone for music and tablet for movies. Once I got it, I had to try it out on my PC as well for music, as I am a DJ and being tethered to the PC or mixer by a cable isn't good at times. So I purchased a separate USB Bluetooth adapter as well.Pairing this to my phone, tablet and USB adapter was quick and easy. I also liked using the touchpads to adjust volume - it was mostly too loud - and turning it off/on when necessary.They fit very well and felt snug enough that they would not come loose under normal activities. There are plenty of ear adapters (whatever you call them) to fit probably any ear.The case was easy to charge as I also purchased a wireless charger. The earbuds seem to be holding a good charge as well. After 3-days of testing and usage, the case reports 95% charged.Listing to music on these earbuds, I noticed the sound was decent. Maybe a little "tinny" (higher frequencies over powering the lower/deep sounds. But this is just my taste and opinion and I'm sure it could be adjusted through an equalizer. Full, rich sound? Maybe not, but other than the tinny sound, it seemed balance enough. Again, an equalizer which is available in some music players would easily solve this.But I also wanted to try watching videos and this is where I have a major issue. Latency - the delay between the source (video audio) and our ears. These earbuds were about a 1/2-second delayed. That isn't too bad if you're listening to music, but for watching videos it can make the video sound like it was recorded in another language and "dubbed". For videos, the video needs to be in sync with the audio you hear. I thought my USB adapter on the PC was the cause but, trying different videos on my phone and tablet produced a similar delay. Three different devices, similar delays pointed to these earbuds as the cause of the latency. Maybe I was too far - with most Bluetooth devices, as you move further from the source, some signal loss is possible and can affect your experience. Not in this case. My PC is about 2-feet from me and both the phone and tablet were within arm's reach. There are no other Bluetooth devices to interfere with the signal and Bluetooth on the devices, and PC, were turned off completely when trying this on another device.Reluctantly, it looks like I need to return these for something with better (less) latency. As I have multiple uses for Bluetooth earbuds, I need to find something that works well for all my needs, not just one.