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Sharp

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.
Fulfilled by Amazon
Arrives Thursday, Jul 23
Order within 21 hours and 45 minutes
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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.

Description

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. Extra-loud alarm reaches up to 115dB — wake up on time for work, school, travel, or early schedules Louder than Phone Alarms Built for heavy sleepers—Sharp Big Bang delivers powerful, dependable wake-ups every morning. 6 powerful alarms—Rooster, Bugle, Siren, Jackhammer, Beep & Nagging Voice to wake heavy sleepers. Sharp Super Loud Clock Sharp Vibrate/Loud Clock Sharp SPC100A Alarm Clock Sharp Clock w/USB Charge Sharp Battery Alarm Clock Is this alarm clock loud enough for heavy sleepers? Yes. The Sharp Big Bang reaches up to 115dB and is designed specifically for deep sleepers and people who sleep through phone alarms or standard bedside clocks. Will this wake someone who sleeps through phone alarms? The Big Bang alarm is significantly louder than most smartphone alarms and uses powerful wake sounds designed to break through deep sleep cycles. Is this alarm clock good for shift workers or changing schedules? Yes. Dual alarms allow separate wake times for rotating shifts, early mornings, or backup alarms, making it ideal for shift workers and busy schedules. What happens if the power goes out overnight? Battery backup keeps your alarm settings saved during power interruptions so your wake-up schedule remains protected. Who is this alarm clock best for? The Sharp Big Bang is ideal for heavy sleepers, teens, students, adults, and anyone needing a dependable alarm clock for work, school, or daily wake-up routines.

Brand: Sharp


Color: Red


Display Type: Digital


Style: Classic


Special Feature: Alarm, Battery Backup, 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 Backup, 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


Number of Items: 1


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: Thursday, Jul 23

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.

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Top Amazon Reviews

    • Game changer
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! ... show more
Reviewed in the United States on January 13, 2026 by Krislynn Landry
    • Compact size, easy to use, and as loud as I need it to be.
Color: Red
Compact size, easy to set, and loud enough for me to hear. I take out my hearing aids at night and sometimes didn't hear the alarm on my phone. With this one, I can set the volume and sound. Easy to hit snooze or turn off alarm. Looks cute in red with large numbers. Easy to turn off the alarm for one night if I want to sleep late. Really like the ease of use for setting my preferences and for handling my morning snooze setting or turning it off. ... show more
Reviewed in the United States on June 6, 2026 by Kindle Customer
    • actually able to hear it with out hearing aids when sleeping
Color: Red
great alarm I can actually hear without my hearing aids when sleeping ! even have to turn it down a bit , its a great item wish I had found it before went thru several diff ones that didnt work as advertised ! would recomend this clock to anyone that has hearing problems the 115dp volume is REAL and works better then advertised ! I have 75% hearing loss and it works for me ! (cant sleep with hearing aids in so cant hear most alarms I have tried) ! ! ! ... show more
Reviewed in the United States on May 30, 2026 by my opinion 4 what it is
    • Actually wakes me up Actually wakes me up
Color: Red
Review Image by Gary Miller
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. ... show more
Reviewed in the United States on February 5, 2026 Reviewed in the United States on February 5, 2026 by Gary Miller
    • Its EXACTLY what is described... I sleep like a rock - this is the only thing that will wake me up!!
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!! ... show more
Reviewed in the United States on November 24, 2024 by Sean G.
    • Very loud (4/2025)! Light issue (10 months later) Very loud (4/2025)! Light issue (10 months later)
Color: Silver
Review Image by Carolyn B
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. ... show more
Reviewed in the United States on October 20, 2025 Reviewed in the United States on October 20, 2025 by Carolyn B
    • Can adjust volume and sound effects. Can be very loud, or not.
Color: Red
This alarm has settings that will wake you up, and the rest of the house too!
Reviewed in the United States on June 8, 2026 by Charles Norcross
    • Chinese junk
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. ... show more
Reviewed in the United States on April 26, 2026 by Tyr Shadowblade (TM)

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