I bought this so I could use the wireless headphones that were installed in an automobile. The system works, and I am able to listen without bothering anyone else. But. I think the LEDs need to be brighter. It is very easy for static to get in the signal when I turn my head and with all the LED lights in our houses these days the chance for interference is very high. Basically I need to sit in the dark to use this item. It might help if the LEDs were brighter. Not sure.

A really cool gadget. Just the right thing I've been searching for. Now I can be looking forward to the upcoming World Cup!!
I purchased this for late night TV watching. Wired it with included 12v power supply, hooked it up to my TV and works great with my IR headphone(To be exact, It's my boy's car headphone but size didn't fit so I took it home and found a transmitter to turn it into a home unit). It's really great that I can now watch TV on mute with my headphone on!
One thing noteworthy: this is an IR transmitter, NOT RF/Bluetooth, passing ppl or obstacles will block the signal!! Please maintain clear view when using the transmitter.

Our new minivan doesn't have a DVD player on the roof so we went with an iPad and a holder that attaches to headrest. Discovered it's not really easy to pair more than one or two bluetooth headphones to an iPad (if you google 'bluetooth broadcast mode' you find some things but it doesn't seem figured out). However we already had 5 IR headphones we used with previous minivan. So we needed an IR transmitter for our existing headphones.

Connected this to an iPad with the included 1/8" cable and it worked great in a minivan. No problems with dropouts even in bright sun. We even had the transmitter sitting in a slot in the back of the console between the front seats close to the floor. It's nice it comes with both AC and 12v power adapters.

Originally, I was thinking about and researching a digital surround sound system for our backyard projector / theater (which can run in the $1,000's). Then I thought I'd just buy one higher end active speaker such as a Mackie Thump 12. The issue is during summer evenings, it doesn't get dark until past 9 pm, and on a weeknight, that means we can't watch a movie without disturbing our neighbors.

What about using our Bluetooth headphones/transmitter or Airpods? Turns out current Bluetooth technology has sound latency - meaning there is a slight delay in sound to visual so the movie might appear that voice and sound is dubbed / lip synced. Sure you can pay more for low latency Bluetooth headphones, but if I want to watch a movie outdoors with multiple people, the low latancy bluetooth tech only allows for one headphone to deliver sound.

What about using radio frequency headsets such as a Sennheiser RS 175 tranmsitter and headphone? Sure, but you can only get up to two headsets connected at one time and the system will run you $250-$300 all in.

Then I had an "Aha!" moment - what if I took the infrared headsets that came with our SUV's rear seat entertainment system - we could watch outdoor movies in silence without disturbing our neighbors! And since the headsets use infrared signal, we can get stereo sound that has no latency because light travels much, much faster than a Bluetooth or radio signal! The only risk - my SUV owner manual didn't state what frequency IR the headsets operate under. I figured for about $30 ($26.99 plus $2.29 sales tax), and Amazon's refund policy, why not try this out.

The Simolio 2 Channel IR Audio Transmitter arrived in 2 days, I set it up (simple, plug in the AC power cord, plug in the 3.5 mm male wire to the projector, choose Channel A or B on the transmitter, choose the same channel on your headset, and turn up the volume on your sound source as high as possible - you can adjust sound volume on your headphones, but want as strong an IR signal transmitting), and it works great for our outdoor projector / theater. No more disturbing the neighbors.

I've included photos of our two teenagers playing a Nintendo Switch video game on the outdoor theater screen. They are sitting about 15 feet from the screen. My projector is about 23 feet from the screen, and I have a 3.5 mm stereo wire that runs ~25 feet connecting the projector to the Simolio Audio Transmitter (when I want to use our outdoor speakers, I use the same 25 feet 3.5 mm male to male stereo wires).

I tend to use Channel B - only because I see a green light on the transmitter when using that channel, but Channel A (shows a red light) and Channel B both work with my existing SUV headsets. Since we have four headsets that came with the SUV, we can have up to four people watch and listen at the same time (and no sound delay/latency!). I could have more audience members I suppose by purchasing more IR headsets, but so far, the four headsets work for what we need with our kids and up to 2 friends also watching. Theoretically we can get up to five audience members by hooking up our Apple TV, setting up Bluetooth on one set of Airpods direct to the Apple TV, and the remaining 4 on infrared that is run off the projector (which is connected by HDMI cable to the Apple TV) and to the Simolio transmitter. As long as there is direct line of sight between transmitter and IR headset, the sound is crisp, clear, and in stereo. I even tried moving to an angle close to the movie screen and the sound works up to the point where I wouldn't want to watch the screen at that angle anyway (about 10 degrees, which is too steep an angle to watch a movie - at most we are sitting at about a 60 degree angle from the transmitter and center of the outdoor movie screen). Simply keep the space between chair/sofa and screen/transmitter clear and you won't have a problem hearing sound. For kicks, I walked more than 50 feet away and still got great sound - not that we'd ever sit that far away. That said, *you do need to face the screen/transmitter* when you have on the headset. If you turn your head sideways, the headset won't register the IR signal from the transmitter (remember, this is line of sight signals in IR wave frequencies that transmit the sound, so something that blocks the signal causes a shadow behind it thus no signal reaches the headset) - not an issue unless you are consistently looking at someone sitting to your side (such as young kids that you have to tell to be quiet and watch the movie). Overall, a great $30 well spent, works with our existing SUV headsets (our SUV is General Motors made, so likely any GM brand vehicle with an OEM headset for the rear seat entertainment system will work - not guaranteed but for under $30, might as well order and try and see if it works - my understanding is most headsets use the universal frequencies that the Simolio IR Audio Transmitter uses so should be compatible). Best of all the headsets and IR transmitter is in stereo, so the movies sound like you are at the movies with left/right sound but without the decibels that might disturb our neighbors. And I didn't have to plop down lots of $$$ on an expensive surround sound system, active speakers, or Bluetooth / RF headsets and transmitters. Very happy with the purchase. Even if the IR transmitter goes kaput in a year or two, for $30, I'll buy another transmitter to replace it since we'll definitely get our use out of the transmitter. But there aren't any moving parts, and I can't see this thing breaking unless I accidentally step on it, drop it, leave it out in the rain, or other user error. Hope this is helpful.

Update 7/15/20: The digital version of the IR transmitter (with optical audio input) became available for about $9 more, and it comes with an optical male to male wire (looks like about 3 ft long). I ordered June 26, 2020, and as of July 15, 2020, the newer product was available. I would have ordered the optical audio version as my Apple TV has optical audio output. Maybe when this analog version dies I'll just upgrade to the digital version. Either way, still very happy with the purchase - just wish that Amazon had carried the digital version earlier or just showed it out of stock (in the Product Question/Answers there is mention multiple times of the digital vs. analog versions) and I would have waited to order the more recent, optical audio compatible version.

p.s. It's important to turn up the volume as high as possible with your audio/video source. Volume is controlled on your headphones. I noticed I will hear more static if my audio source volume is low, but as I turn it up, the IR signal is "stronger" and static goes away. I keep my projector volume at the highest setting of 10 and each person turns up or down their sound volume on their headset.

Works fine with Planet Audio PHP22 headphones. There seems to be a limit in the vertical
angle as well as the horizontal angle. This limits movement of the listener.
I didn't expect it to have the range of rf. The sound is very good (at least to my
old ears). The volume control on the headphones is very useful.
In the beginning I was very surprised to find that this setup worked even
when I turned my back to the transmitter. Of course, any solid obstacle makes it
stop working.