Could someone tell about DDS 500 belt?

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Hello. I am not native English speaker.
I live in Israel.
Suffer from disks at levels L4-S1 and C3-C5.
At low back I have passed 2 surgeons discectomy of L5-S1 in 2008 and fusion L4-S1 in 2011. immediately after surgeons I got improvement but after 6-8 month arrive decline in health. I use prism glasses to avoid slopes of neck.
physiotherapy, acupuncture and shiatsu don't gave me relief.

Recently my friend that suffers from low back pain too, mentioned about DDS 500 belt.
I told him "I don't believe it cause I have experience with common orthopaedic belt". I tried to google information about DDS 500 but took advertising sites only.


If anyone has experience with DDS 500 belt please tell me.
Thank you in advance.