I've been using these for several months on a weekly basis. I only leave them on for about 2 1/2 hours each time, but the battery is still nearly full. Sound is clear. Good value for the money. The connection is really good, but I'm going a fairly short distance.

These are pretty good and this review probably would be 4.5 review if you could give that. My application is to extend some Active speakers wirelessly. I DJ small ballroom dances and putting speakers at the end of a long room (38x78 feet) works much better for even sound. To do this with cables would require 2 100’ cables which is expensive and a pain to set up (plus it introduces a tripping hazard if you don’t tape the cables down) . These solve the problem nicely. I purchased 2 pair. One pair for each speaker. I plug the transmitters into the mixer and the receivers into the speakers and it works perfectly. Just like being cabled. At this point, I have extensively tested them and have used them for two dance events and both have been very successful. The attendees appreciate the better sound and many have commented on the improvement.Minor reasons for not giving them a 51) The design of the devices prevents you from plugging them into a mixer side by side. They are simply two wide if you are using XLR. The solution is quite simple – buy two 6” xlr cables and plug them into that. Works great. This might not be a problem if you are using the 1/4" adapters as you could probably rotate them 90 degrees and it "might" work.2) I purchased two pair. During testing and at the first dance event, I noticed that one pair had some minor breaks in the sound when people passed in front the receiver. Give ballroom dancers are moving around the room that is a big issue issue. The same pair was also having difficulty turning on. It would just shut down after you pressed the power button. After about 4 tries it would finally stay on. I decided to just return the one set to Amazon and reorder. The new set is fine. 1 out of 2 isn’t a great average so quality might be an issue.The good1) They actually have tech support and it is GOOD!!, albeit hard to get to. You have to through Amazon and send an internal email. They respond usually within a day but it is clunky. You have to scroll through their response (this is an Amazon issue) and you can’t print the whole message. That issue aside, the person actually read my question and responded with meaningful answers Usually you get someone who just copies and pastes canned responses but that was not the case.2) One of the complaints that many people have with these units is they don’t lock on to a frequency so it is very easy to have both receivers connect to one transmitter. Keeping them farther apart when you turn them on helps but that is still clumsy. It turns out there is a way to lock the frequencies (thank you Technical Support!!). Unfortunately, the technique is not documented in the abysmal included instructions. Here is the response from their tech support person and I did what she suggested and it works perfectly“If you need to use multiple pairs of transmitters and receivers at the same time, you could use the following methods. First, turn on the first pair of receivers and transmitters, and after adjusting for the channel you want, turn off the first transmitter, then press and hold its button until "ID SYNC" appears, then release it. This will lock the first pair of transceivers into a matching state. Then do the same for the second pair of transceivers and you can achieve multiple devices at the same time”3) I have noticed no delays and no drop off in sound quality. I have a microphone plugged into the mixer and it comes out both speakers with no lag. I is just like I am cabled.Overall I am very pleased and the price was quite reasonable. There are 4 or more vendors on Amazon that are selling exactly the same devices and Facmogu was the cheapest. I can’t comment on use for microphones but for speakers, I would highly recommend them.

It has good sound but loud noise is popping up while using it. It is also wide that it is covering the next channel input of the mixer so you have skip one channel to insert another microphone jack. After few times using it, the receiver is always dead.It’s totally unusable.

Does what it's supposed to do, seems well made and sturdy. The instructions suck, which is why only four stars. Frankly, you get more information from this listing on Amazon then you do from the instructions that come with it. However, right now it does what it's supposed to do and seems well made and sturdy. Will update on battery life and how well it continues to function.Raised to five stars in spite of the joke of an instruction sheet. As I said, you can find out more from the web listing. I have used it once outside of the house now, and it functions fine, sounds good, and seems to have decent battery life.It doesn't hurt that they were offering a coupon at the time that I bought it. That's actually why I picked this one.

First, the instruction booklet and on-line support are useless and non-existant!I purchased a second wireless device after purchasing a second condenser mike. I wanted to run two condenser mikes into mixer for my ukulele band.Initially, I hooked up both mikes, transmitters and receivers. Both receivers continually reset to the same frequency as initial activated transmitter.I got around this with a lot of on and off sequencing of transmitters and receivers. I set up separate frequencies on one device at a time, while other one was off. Then I turned off both devices. I plugged in both receivers to the mixer and turned them on. I made sure the frequencies were different. Finally, I connected transmitters to mikes and quickly turned on transmitters before transmitter has time to change the receivers frequency to a single frequency.I still need to test more before I would uses it for a performance.