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Sonic Alert Sonic Boom SB300ss Vibrating Large Display Alarm Clock


Availability: In stock



Quick Overview

The stylish Sonic Boom SB300ss from Sonic Alert has an easy-to-read large display and strong bed shaker, ideal for deep sleepers, Deaf or hard of hearing users, seniors or students.
  • Large 1.8" bright green display is easy to read.
  • Automatic display dimmer adjusts in dark or bright light.
  • Wake up with the loud audible alarm, vibrating bed shaker or both.
  • Battery backup.

Sonic Alert Sonic Boom SB300ss

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  • Sonic Alert Sonic Boom SB300ss
The stylish Sonic Boom SB300ss from Sonic Alert has a large, 1.8" display and strong bed shaker that is ideal for deep sleepers, Deaf or hard of hearing users, seniors or students.


  • Adjustable tone and volume
  • User selectable snooze time from 1-30 minutes
  • User selectable alarm duration time 1-59 minutes
  • 12/24 hour time format
  • Automatic display dimmer
  • 5 level dimmer
  • Battery backup (9V battery not included)
  • Powerful 12V bed shaker
  • 1.8" bright green LED large display
  • Sound and vibration notification only
  • Extra loud pulsating audio alarm
  • Test mode
  • Dimensions: 9" W x 2" D x 5" H

How the SB300ss works:

[Click for user manual]
Warranty One year warranty
Brand Sonic Alert
Product Type Alarm Clock
Alert by Audible, Vibration
Alarm Clock Style Desktop
Lamp Plugin No
Built-In Signaler No
Dimensions 9" W x 2" D x 5" H
Power Source A/C
Battery Backup Yes
  1. Great device Review by Jennifer
    Overall Satisfaction

    Got this for my son who is hearing impaired and needed a device that would wake him up when he was away from home . The vibration when the alarm goes off is strong enough to wake him up as he is a heavy sleeper and cannot hear without his cochlear equipment on. Since we got it he has been able to get up on his own every morning using the vibration mode. Love this device and would highly recommend it. (Posted on 4/13/2017)

  2. Just right! Review by Joyce
    Overall Satisfaction

    Its perfect. For first time I can sleep without my hearing aid! (Posted on 3/13/2017)

  3. Great for deaf/blind individuals Review by Jennina
    Overall Satisfaction

    Excellent for a deep sleeper and the numbers are large enough for the visually impaired too! Great product but would recommend larger controls and even buttons on the front if possible. For anyone who is visually impaired, it's a bit of a struggle. Still my first choice though :) (Posted on 11/14/2016)

  4. Good Review by Bob
    Overall Satisfaction

    Been looking for a loud clock glad I found one (Posted on 9/16/2016)

  5. Very satisfied Review by Brian
    Overall Satisfaction

    Alarm and vibrating plate are sufficient to wake me. Setting controls on back make changing time and wake-up time a bit awkward, but acceptable. Snooze is easy to use but it takes two hands to turn off the alarm switch without knocking the clock over. (Posted on 11/16/2015)

  6. good value at the price, but needs engineering work Review by Emilie in Minneapolis
    Overall Satisfaction

    I assume it is a reliable clock which is expected and it does do its "sonic boom" thing. My previous Boom lasted over 20 years. This one has a few engineering issues: 1) The little foot thing that is supposed to hold the clock up does not fit in the channel where it's supposed to go and is so very thin I was afraid to give it a good shove. It won't last long. 2) Way too light! I have to use two hands to work the OFF/ON slide. Otherwise it leaps off the bedside table or scratches it. 3) Resetting the alarm is irritating. The controls are at the back. 4) There seems to be a hanger on the back if I wanted to mount it on the wall, but that would be impossible to use in any application I can think of. It also seems to ask for a cracked case. (Posted on 2/23/2015)

  7. Great help! Works better than anything else Review by ASLTeacher
    Overall Satisfaction

    After being late for work several times because I slept through my alarms, I decided to try this clock. It has been a Godsend. I have not overslept once since I started using it. (Posted on 2/19/2015)

  8. Disappointed Review by Lipreader
    Overall Satisfaction

    I had this clock for 6 years and this morning, I woke up to it smoking & burning!! I can't believe that's all I got out of it for as much as it costed!! I can't even get an exchange or anything for it. (Posted on 2/17/2015)

  9. Excellent and easy to use Review by Florida couple
    Overall Satisfaction

    Easy to use (Posted on 2/17/2015)

  10. Good value and awesome alarm clock Review by deadGorilla6
    Overall Satisfaction

    I have had this Sonic Alert Alarm clock for 12 years, I never have any problem or replace. however, this one is best Alarm clock I ever had!! big thumb up! it's my second order ;) since my old one was accident fell in water bowl "haha" (Posted on 9/15/2014)

  11. Perfect! Review by Joel
    Overall Satisfaction

    Got this clock for my Mom who is very hard of hearing. She was concerned about getting up for church because she could not hear an alarm. A bit apprehensive at first, but she said it worked like a charm. She loves the vibrator that wakes her right up! One thing to change: the controls are on the back, she is 77 and her fingers have a hard time setting the alarm and using both hands to shut it off. Other than that, she said it was just what she needed! (Posted on 5/21/2014)

  12. Very satisfied! Review by ml
    Overall Satisfaction

    Previous vibrating alarm had a ring and vibration of which neither could be adjusted and startled me every morning for 17 years. Hope to get at least half that with this alarm which has a soothing vibration and ring control. If the alarm was easier to turn off it would get 5 stars, otherwise it's a keeper. (Posted on 3/9/2014)

  13. Completely happy Review by Becca
    Overall Satisfaction

    This is the second time buying this clock. The first one lasted 5 years. I'm a very deep sleeper and this clock has helped me tremendously. It has been a few months with clock #2 and so far so good. (Posted on 1/20/2014)

  14. Great features Review by Cario
    Overall Satisfaction

    This clock has several features that can be customized: display brightness, snooze time, alarm duration, volume, and tone (high or low pitch). The display can be brightened or dimmed by pressing the snooze button. The display won't be affected by hitting snooze when the alarm is going off. Highly recommend reading the instruction booklet to fully access all of the customizable features.

    There are only two things I would change (hence 4 stars instead of 5).
    1) Too lightweight... you need two hands to turn on/off the alarm, one to hold the clock down, the other to slide the switch on the side up and down.
    2) Move alarm setting controls (hour/minute) to the front.

    In all, it a great clock and I would recommend it to a friend. (Posted on 1/13/2014)

  15. EXCELLENT Review by gina
    Overall Satisfaction

    I normally sleep through 2 alarms,within a arms reach.This gently nudged me awake and i was up at 412am to get ready to fly to Va.I am truly happy about owning more sleeping and almost being late for work.... (Posted on 12/27/2013)

  16. Sonic Alert Review by John
    Overall Satisfaction

    It's ok... You can't dim the light or plug a light into the alarm clock. It only has a port to use a vibrating box. (Posted on 9/26/2013)

  17. AWESOME alarm clock!! Review by Kay D.
    Overall Satisfaction

    This is my 2nd clock and this one is WAAYY better than the 1st one I had and I highly recommend this clock for anyone who is either hard of hearing or deaf as in this case-I'm totally deaf in my right ear and very hard of hearing in my left ear,,I really needed a dependable clock to wake me up and be at work on time as I wanted to be independant as much as I can be and this clock has helped me to do just that..Harris Communications is a GREAT place to look for just about anything you need whether you're deaf,hard of hearing or have vision problems as in this case,I have all 3 issues...The prices here are reasonable as well...Thanks,Harris Communications!! Kay Dabney (Posted on 8/28/2013)

  18. Great Value for a great product! Review by CoasterMedia
    Overall Satisfaction

    This is a good value for a decent clock with a strong vibration to wake up with a 15 minute in between every snooze button. i'm usually up right at the 2 or 3 time after I press snooze. Great clock! (Posted on 7/23/2013)

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