treating hand tremor

Good afternoon,
I am not a Parkinson sufferer, but i do have acute hand tremor, had it for years and getting worse. becoming bilateral.
I have just discovered on the WWW a device manufactured by an American company -Cala Systems. Worn on the wrist. I cannot find out the cost or if it is available in the UK.
I have read on this site (cant find it now :face_with_diagonal_mouth: :no_mouth:) a gentleman has a device from tens - I think he said like an egg, which he finds useful.
Can anyone tell me about either device - cost, efficacy, anything useful.


Hiya this device is for essential tremor not parkinsons tremor