Sharp Big Bang Super Loud Alarm Clock for Heavy Sleepers, 115dB Extreme Wake-Up Alarm, Dual Alarms, 6 Wake Sounds, Large Red LED Display, Dimmer Control & Battery Backup, Bedroom Clock
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Availability:
In Stock.
Arrives
Tuesday, May 12
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Color: Red
Features
- DESIGNED FOR HEAVY SLEEPERS & DEEP SLEEP - Built specifically for people who sleep through phone alarms and standard clocks. The Sharp Big Bang delivers powerful wake performance for adults, teens, students, and shift workers who need dependable morning wake-ups.
- 115dB EXTREME WAKE-UP PERFORMANCE - Extra-loud alarm reaches up to 115dBlouder than most household alarmshelping ensure you wake up on time for work, school, travel, or early schedules when waking up truly matters.
- 6 HIGH-IMPACT WAKE SOUNDS THAT BREAK THROUGH SLEEP - Choose from Rooster, Bugle, Siren, Jackhammer, Beep, or Nagging Voice alarms designed to interrupt deep sleep cycles and prevent missed alarms or oversleeping.
- DUAL ALARMS + BACKUP SECURITY - Set two independent alarms for weekday/weekend schedules or backup wake times. Battery backup preserves alarm settings during power outages for reliable everyday use. Requires 2 x AAA batteries (not included)
- LARGE EASY-READ DISPLAY WITH DIMMER CONTROL - Oversized white LED display is clearly visible across the room with adjustable brightness levels, providing comfortable nighttime viewing without disturbing sleep.
Brand: Sharp
Color: Red
Display Type: Digital
Style: Classic
Special Feature: Alarm, Battery Back-up, Super Loud Alarm
Product Dimensions: 3.55"W x 5.91"H
Power Source: Battery Powered
Room Type: Bedroom, Living Room, Dining Room, Kitchen, Kids, Nursery, Bathroom, Home Office
Shape: Rectangular
Indoor/Outdoor Usage: Indoor
Display Type: Digital
Additional Features: Alarm, Battery Back-up, Super Loud Alarm
Power Source: Battery Powered
Indoor Outdoor Usage: Indoor
Batteries are Included: No
Mounting Type: Wall Mount
Number of Batteries: Unknown batteries required.
Alarm Clock: Yes
Operation Mode: Electrical
Input Voltage: 120 Volts
Smart Home Compatibility: Not Smart Home Compatible
Watch Movement: Automatic
Item Dimensions W x H: 3.55"W x 5.91"H
Item Weight: 0.78 Pounds
Size: Large
Frame Material: Plastic
Color: Red
Style Name: Classic
Room Type: Bedroom, Living Room, Dining Room, Kitchen, Kids, Nursery, Bathroom, Home Office
Shape: Rectangular
Theme: Music
Dial Color: Red
Clock Form: Time Clock
Brand Name: Sharp
Manufacturer: Sharp
UPC: 049353008615
Manufacturer Part Number: SPC657AJAMZ
Unit Count: 1.0 Count
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, May 12
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Color: Silver
This is the best alarm clock ive ever purchased! When i say, Its able to wake me up i can almost guarantee it gonna wake anyone else up that purchases one also! Its well worth the money! Before purchasing this i have always had the hardest time waking up with an alarm clock! I used to have to set several different alarms with several different sounds in hopes that one of them would wake me up but most times i wouldn't. I would sleep right through all of them because none of them were ever loud enough! THIS ONE HAS BEEN A GAME CHANGER FOR ME! I was surprised with how loud this one is and all the different options it has to choose from! All of which work amazingly well! It's actually able to wake me up the very first time it goes off each morning. What makes this one stand out even more is its not only loud but you can you choose different sounds along with being able to change the tone of each one of the sounds and also change the volume level of each one!
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Reviewed in the United States on January 13, 2026 by Krislynn Landry
Color: Red
This is so simple and loud. So easy to work, easy to read and set the alarm. I am training my 7 year old to get out of bed on his own. He likes the silly noise-like the mom that yells at you to wake up or a rooster. I really like having a clock with a REAL old fashioned cord to plug in. I would suggest this if you need a learner alarm clock or if you need something annoyingly loud to get up. My kid loves the black and red look too
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Reviewed in the United States on March 28, 2026 by MEB
Color: Red
This Sharp Big Band Super Loud Alarm Clock - is the real deal. It isn't a normal loud, it is EXTREMELY LOUD! Which is exactly what I wanted and needed! It has different wake up sounds and has I think 1-15 different loud settings, 15 being the loudest. If your anything like myself (I would call myself a very, very, HARD sleeper, anything above "10" will work for me) but I still have it all the way up just so I know ill wake up regardless! It's a blessing and a curse to be able to sleep like I do, but the curse is that normal alarm clocks just don't do it! I even looked into those alarm clocks with a shaker for your pillow.. I can tell you with how loud this is, you don't need anything else but this alarm clock! To give you a little example of how deep of a sleeper I am, when my fiancé and myself were in the hospital after our third child, the fire alarm for the brand new hospital we were in, went off and everyone on our floor ran out of their room thinking if was for real, and this was around 3AM in the winter, there was snow on the ground outside - I was still sleeping on the bed completely unfazed from this gigantic alarm going off through the hospital. Yes I was a bit sleep deprived as well but still, even if I wasn't, I would not have woken up.. So after saying that type of story, and for me to say this works for me should tell you how loud this alarm clock is!! I will say if your sharing a house with roommates, small kids, or a family - you may want to let them hear it so they at least don't awaken frightfully when it goes off lol regardless where this alarm is located in your house, it WILL wake up people throughout the house if you have to have it on the loudest setting. My fiancé can literally wake up to her phone vibrating in the morning. She is a very light sleeper so if she was around in the morning to hear this alarm clock go off it would probably blow her eardrums out (lol being a little dramatic but it is extremely loud when your right next to it) but really this is so loud it will wake some up everyone in the house. In all seriousness this alarm clock does its job for HEAVY SLEEPERS and is a fantastic!! I have loved it since the first morning Ive used it. It has not let me down yet and I HIGHLY recommend this alarm clock to the people that sleep similarly to myself. 5 out of 5 stars for this product! Love it!!
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Reviewed in the United States on November 24, 2024 by Sean G.
Color: Silver
Update 10 months after purchase. Had to order another one because the numbers are no longer lighting up properly. See picture. Time is 11:58 but hard to tell, especially when half asleep. And the picture makes it seem more clear than it is. We are trying to teach our 15 year old grandson to get up on his own. He sleeps so hard that when he wakes up it is like he is coming out of general anesthesia, I am not kidding. This is super loud and does a great job waking him up. The reason I can’t give 5 stars is because it turns off after a few minutes- that defeats the purpose. He knows that all he has to do is lay there for awhile and can fall back to sleep. Fortunately he uses the second alarm, but still - it should not turn off until he turns it off.
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Reviewed in the United States on October 20, 2025 by Carolyn B
Color: Red
A great alarm clock, and it can be as loud as you need. It will definitely wake you up in the morning if you are a heavy sleeper. It's a clock with a few alarm options. What more could you want from an "alarm clock"?
Reviewed in the United States on April 9, 2026 by Amzn Regular
Color: Red
I am a very heavy sleeper, have been using this for a month. Power went out for a couple hours and the clock face and alarms aren’t visible but when power goes back on the time was very accurate when using the battery backup.The noise level is very loud and actually wakes me up. The clock face is dimmable so you can still see it during the day and not blind you at night. Light weight and durable.
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Reviewed in the United States on February 5, 2026 by Gary Miller
Color: Red
If waking up has ever been a problem in your life, this is the solution. This alarm clock is EXTREMELY loud. Very easy to use, you can adjust the brightness, I feel like its priced fairly. You are able to install batteries as a back up to keep the time. I have tried other alarms and none of them get as loud as this, it genuinely works. I now own 3, 1 for myself and my children
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Reviewed in the United States on March 11, 2026 by jackie
Color: Silver
This is a poorly made, low quality alarm clock that looks very nice and is functional. On 15 volume it really isn't much louder than the cheapo 1980s alarm clock I replaced for this. Unlike this pretty clock with novelty alarms, the battery backup on my old clock would actually light the display and sound the alarm during a power outage. Battery only retains the time and settings. The plus button to set the time and increase the volume did not work at all, and I was about to return it until I discovered that if I pressed it at a weird side angle it did actually work. None of the other buttons had that issue. It is a very nice looking trashy Chinese piece of junk... but the bugle noise amuses me. Reckon I'll keep it until it inevitably breaks.
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Reviewed in the United States on April 26, 2026 by Tyr Shadowblade (TM)