So far, this item has been a blessing! In less than a week it has helped me find two sets of "misplaced:" car keys. We have a couch that actively devours things like keys, ipads, wallets, tv controls, etc. Its favorite food is handkerchiefs! So far, the only criticism I can make is that having the sound level higher would be a help. If - in the future - this gizmo lets me down, I will change my rating. For now, I cannot praise it too much!
A unit that is set up to locate 8 "misplaced items" would be an even greater boon!

I am FOREVER losing things... So far I am only using 1 of the 4 locators - on my Kindle... My husband put a rubber band through the transponder, then attached it to my Kindle case. It is BY FAR worth the price. I have about 12 other things (At least) I could use these for. Not sure if I buy multiples if it will work. But I have to say, I am SOOOOOOOO Happy to be able to find my Kindle when I misplace it.

Do you have kids? We have three of them. By the time I get home from a long day at work, sometimes I just need a little Netflix or Amazon Prime.

Before I got these, there was this hellish period of "You've got to be kidding me? What do you mean you don't remember where you put it?!?!" Sure, we had a designated basket where the remotes should go, but they'd be under the couch, under a blanket, in the next room, etc.

Now, all I do is click a button on the base remote and the fob chimes away and we have fun finding the cussed little devices. Sure, they still end up in every conceivable unusual spot, but now we can find them.

It works through furniture, at least 20-30 feet away. If there are walls involved, no biggie, I just walk around with the remote clicker and push a few times. Never failed us in about two months of use. If you'd like to use it for keys, I think it would work equally as well.

Each fob chime it a simple series of beeps, but each has a different note or tone. So if you're searching for multiple items at a time, you'll just hear different notes.

My only complaint is the form factor doesn't work aesthetically for our current use, but we don't care. Now we can find our remotes in seconds. I'd give it 4-4.5 stars for that, but the positive impact it's had on this small sliver of our lives is fantastic. First world problem, but now it's solved.

I highly recommend this product!

These work great and we use them a lot. when you first get them, make sure you have the batteries in right. The thicker side of the flat batteries goes in so you can still see it once it's in. Just push it in till it fits. There is no click. Then, when you use the control pad, hold the key down for at least 5 seconds. I thought it was broken for a few hours because I didn't realize I couldn't just click the buttons. That said, SOOO glad I bought this. It's a great product at a great price. There is a flash light on the control and each pad has a small red light and makes a noise.

Came on time, good packaging.
Got one before and it works great. Some limitations with distance and intervening walls, just like your WI-Fi so don't expect it to work from outside the house, the yard etc. Just test it to set its limits. Worked well for me, so I got one for my mother. She misplaces her wallet/change purse all the time and she gets upset when she cannot find it. She is in Greece and the construction is concrete and bricks with stucco on the walls, so I don't know how it will work there. I'll update when she tells me.