无线演示器，超链接音量控制演示点击器 RF 2.4GHz USB PowerPoint 点击器演示遥控器指针幻灯片推进器（黑色）

Oh YEAH!! 8th grade algebra teacher and coach, I use this thing EVERYDAY. Works fantastic and from everywhere in my classroom. If you teach or present you NEED this thing!!!

I love the green light laser! Nice design and functional. Good service range and a must to aid a presentation!

This is a knockoff, which is fine by me for the price paid. However, after using it only 3 times, now the laser always turned on. The rest works fine, but I can’t have this light work all the time.

This works really well as a plug and play device. Have bought this item several times and it is always reliable.

Update (three months later):
OK, I take back anything positive I’ve said about it, it is crap. Specifically, the receiver is crap. I had one case before where it seemed to hesitate when advancing, and then double advance. I didn’t think much of it, it could’ve been the computer it could’ve been anything else so I just ignored it. Well today, it got me harder. All the sudden, out of nowhere, it started rapid advancing through and to the end of all of my items. Even after it got to the end it kept trying to advance further, and blocked other interactions. I turned the remote off and it kept doing it, meaning that the problem was in the little receiver.
I had already experienced a couple of hesitations where it would wait to advance, and then suddenly advance after a couple seconds. That was the same kind of thing I had experience before but now it was more clear that it was the remotes fault. However to suddenly Rapid advance through the entire presentation, and then keep trying to advance even with a remote turned off, was the last straw.
I would return this thing if I could, but it is about 28 days outside the return window.

Don’t buy this!

原评论：
So, the description for this thing says it can work over something like 90 feet minimum to over 100 feet. Or maybe it was meters. Either way, I have a tech balcony that is about 12 feet off the ground, and 60 feet away from the stage. I plugged this thing into a computer that was just below the balcony rail, and tested that it worked while standing next to the computer.
However when standing on stage, it didn’t work at all. I reiterate, that is approximately 60 horizontal feet, and 10 or 12 vertical feet distant. Not at all the 90 feet it’s supposed to work over.
Just for kicks, I walked to the middle-back of the room, which was probably 25 feet diagonal away from the receiver, and it’ still didn’t work.

So the whole purpose for which I bought this—long range as it says in the title—is completely out the window.

It’s a good little remote, don’t get me wrong—it works in every other way and I actually like it, but For the purpose for which I got it, it is completely useless. And the description lies.

Laserpointer erfüllt seinen Zweck. Liegt gut in der Hand. Guter Empfang und lange Leistung