Can anyone tell me how strong BT 150 vibration is?

[Joellybaby]

Hi everyone,

I'm researching which monitor to get and the BT 150 seems popular. I wondered if anyone who has this one can tell me how strong the vibrate alert is?

My mum is deaf, so vibrate will be really useful if she's babysitting for me, but if its anything like my iphone vibration I know its easy to miss even in a pocket.

There's special monitors for deaf parents that vibrate strongly enough to wake you from under your pillow, but I'm reluctant to spend more on a specialised product when it won't get used that often.

Most grateful if any owners can answer!