16MM Buzzer Red Indicator Light Lamp 12V DC LED 0.63" Round Cap Alarm Signal Indicator Electrical Control Panel DIY 2Pcs (Red with Light,12VDC, Round)

These are absolutely great as a warning device, and they're going to work perfectly for the circuit I made up for my friend's boat. I'm going to use one of these along with a float switch in the bilge to detect high water. Combined with some wiring, a relay and a momentary-off push button switch, I created a lock-on relay circuit with the float acting as the "on" and the push button the "off". I also have an "arm" switch because I'm pretty sure with how hard his boat slams into waves, the poor float switch is going to be getting activated every five seconds when at speed. But, since we then stop (so I can pick up my vertebrae and he can start fishing) it'll be nice to have an alarm in case we start to, you know, sink. Again.

We dropped our "death star" landline after they wouldn't fix our DSL line (yes, I know it was old tech, but not many other choices) so several of our phones became obsolete. We still had one in the house and one in our shop building along with 4 perfectly good wires in between so I wondered what I could do with them.Found out from YT how easy it was to create an intercom with the old phones so I did. That was good but I needed a signaling device to go with it. After some research, I was able to create a circuit using the remaining two conductors, common ground, two 555 circuits (for flashing) and two of these LED lamp/buzzers. If someone in the house presses a button near the phone, both the local lamp/buzzer and the one in the shop starts flashing/buzzing calling for someone to pickup the phone (and visa-versa).While the "buzz" is high pitched and about the same as a smoke alarm, we've gotten use to it so a person in the house or the shop can signal the other to pick up the phone.At any rate, the combo lamp/buzzer draws little current and works just fine. This item would work great for any project that needs both a visual and audible alarm.

as described, has decent volume, beeps when the light flashes, has a slight delay before it starts flash/beeping so don't use it for anything critical.

Comes in a nice box with spade crimp connectors and heat shrink. Terminals are very small so it's nice to have the connectors included. Initial testing they are plenty loud and LEDs worked. All plastic housing/cover.I ordered the 12V version, but received one 12v and one 24v.

I mounted this on my street legal golf cart because the turn signals do not auto-cancel and I end up driving down the road looking like a complete idiot and pissing off other drivers. It works great but my wife complains its too loud for her. Doesn't bother me and I never leave the turn signal on any longer. super easy to install

Installed these in my race car for Oil pressure & Alternator "fail safety" idiot lights. They are highly visible and can be heard through my helmet (tho not yet tried while running).

10 out of 10!

These are great as a key on reminder when used with the oil pressure switch