nVision Hopkins 20101VA-CL-EN Back-Up Alert with Audible Back-Up Warning 3156 Style Light Bulb

Installs like changing a bulb. Not a loud as I hoped but it is loud enough to catch someones ear that's all that is needed. Good product. I'll buy it again. Also the delivery was really fast, Way to go Amazon !!!!

I loved it alot, able to install it and it works fine for my pickup truck. Its not a blast sound but someone can hear it before you backup,even though I have a backup camera I just want someone to know that I am backing out so they can be aware of it as well as me seeing them before anything bad happens.

Not loud enough,can not hear more than 10 to 12 feet from alarm.I have had other brands that I could 100 or more feet away.I purchased another one that I had to wire in to the reverselight wire. Now it works really good.I left the other one in, being I needed a new bulb anyway.

Would not work on 2015 Honda CRV because of size will not fit through hole on back of tail light assembly

I agree with the previous review, as the item(s) don't fit standard bulb receptacles, nor the opening in the taillight assembly. But if you have a dremel & a hot glue gun, it's worth the trouble. I put 2 on my van and believe me, they're LOUD! Just one is enough to let people know your backing-up, plus there much brighter than the regular bulbs! But make no mistake, this item IS a "Handyman special".

Installed on a 2014 Chevy Volt. Because it's in a pretty thick plastic housing, the beep isn't very loud but on the positive side, that means less chance the neighbors will complain or pedestrians getting startled compared to the OSHA approved beepers. I think it's loud enough for someone who's near the car to hear but it definitely isn't a substitute for a visual check (fortunately the car also has a backup camera).I didn't want to splice into the wiring so this is pretty much the only other option available. Hopkins says there's a lifetime warranty so I'll keep my fingers crossed with the halogen bulb and beeper.

Failed after less than a year. The second one i’ve had that failed. If it lasted it would be great

The light bulb is wonderful. It's halogen, very bright but it heats up the fixture, so be mindful when sitting in reverse. Good idea to keep it less than a couple minutes. More later. The Alert: It is supposed to "BEEP". When it sounds Feeble and sounds like hungry sheep or a duck and people are looking, It will soon be silent. I drive for a living - an excess than 40k/yr. I have a number of vans, each with at least one of these units in the drivers rear. The beepers rarely last me a whole year in my active vehicle. I' sure most people would do much better than I, as I get a saltwater bath more than once a week and every day do many miles of unpaved roads full of potholes and water in the winter and potholes and dust in the summer. Just a few days ago (Wed) I replaced the unit again. It was lighting up but the beep only lasted a week. Tonight (Sat), I just moved my van to unload and silence again. The light was good, (It's very dark here and I'd know instantly if one was out). I opened the door and peered back. Lots of light. I stopped the engine and turned on the key...Light but Silence. There's only one circuit in these units. Whenever they light, they beep and vice versa. If only one function is working, the problem is not the wiring in your vehicle, It's the unit. Recently I've had a lot of failures. I count 4 failures now in the 2 years I've had this van and now I'm going to write the company to avoid a fifth. Very frustrating to say the least. I've been using these for better than 15 years. On one occasion I know the Alarm warning did pay off. Funny story involving a tourist but I'll spare you. I do know my back-up alarm did the job that day.Note: It's really easy to order the wrong unit. The 3156 bulb is the rectangular bulb socket. The other style is the round bulb, (older 1156 style). More about the heat...My personal experience. If the backup light fixture is really dirty or gets cracked and dirt/dust gets inside, it will overheat easily. The plastic lens won\t melt or anything like that. The bulb socket gets cooked and deteriorates over time till it no longer functions and you have replace the whole unit which may or may not include the whole tail light fixture. This is intended for myself as well: "We all know that proper attention to one's vehicle is the best way. to go."Up Date: (Several months later.) I wrote the Co. They said "send the bad ones". I sent 3, They quickly sent replacements and I was impressed by speed, attitude and service. One did not work, One worked w/lite only and one worked w/lite but faint useless beep. No Comment.., Except yesterday I drove one of my older vehicles w/1156 (Round Socket bulb backup alarm) - more than 8 yrs old... works great.My Solution. Installed another mfg's beeper (only) unit inside behind tail light, securing w/cable tie. Installed $40.00 (22 watt LED cluster) in backup lite socket. Brightest light I could buy, actually hurts the eyes but really lights up the behind. And... with almost no heat to destroy the fixture.