Y⃒̸̷̝̜̙ͥͥͥngmar<p>Got refund, left 1-star warning and did the obvious, crack the thing open.</p><p>Test button works, status LED flashes and yet, never mind smoke, even shoving some tin foil inside the detector causes no alarm.</p><p>It has what looks like an IR LED and a photo diode, but the LED isn't lit. It's not even powered. Great battery life, I'm sure.</p><p>This is a complete fake that can never work. 1000+ sold, proclaims the listing. That's a lot of potentially burning to your death.</p><p><a href="https://social.tchncs.de/tags/Fake" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Fake</span></a> <a href="https://social.tchncs.de/tags/AliExpress" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>AliExpress</span></a> <a href="https://social.tchncs.de/tags/Smoke" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Smoke</span></a> <a href="https://social.tchncs.de/tags/Alarm" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Alarm</span></a></p>