You'd have to be a hibernating bear to miss the vibrations of this shaker. It's the real deal. It will wake you if it's anywhere near your pillow, but right under the pillow is best. I like that the interval and frequency of the vibrations is varied so it hits your individual "sweet spot" for everyone. It does the job.

I use this shaker with the main unit to "hear" my post-stroke husband at night if he calls me. I'm deaf so could not hear him, but he also has aphasia and cannot really call for help. He can push a button. We couldn't live without it, and its dependability. Thanks Diglo.

It works so good. 'Thanks.

I purchased this with the cell phone gizmo. Love them both!

Works great!! Highly recommended. I bought it to go along with this product, which is amazing (works with my hospital pager so that I can sleep without my pager attached to me): Serene Innovations RF-200 Cell Phone Signaler SKU: HC-RF200

Really thank it.

I'm a heavy sleeper and when I a friend told me about this I was in shock. I instantly went home and bought it. It's worked everytime. Now I'm not late to work and im so happy thank you great product.

I had the main unit former years, and needed a replacement vibrator. This fits the bill,and I've been using it since I got it. Thanks.

This is one of the better inventions for someone very hard of hearing.

Purchased this for my mother. Works way better than I ever could have anticipated!

Great invention! Before I'd be asleep and miss multiple calls from my wife. Supposed she'd been in an accident or hospitalized? With shaker this bed shaker, both I and my wife feel much more confident that we'll ALWAYS be in contact with each other no matter if I'm asleep or not! **Use the bed shaker with the Serene RF-200 or CA-CX for notification of cell phone and landline calls. - Diglo**

Used mine for 10 years until my new kitten chewed through the wire. Was so happy to be ale to buy another. It's very powerful easy to slip under the corner cover of my fitted sheet.

This shaker is very powerful. It took some getting used to as it scared me and my dog the first few times. It definitely gets the job done.