The printed material accompanying the device contains a disclaimer indicating it is "not suitable for those with" conditions including heart disease and pacemakers. I am being treated for a heart condition and have a pacemaker surgically implanted. There was no such alert on the website offering the product for sale. The company has not answered its telephone after hours waiting any response-automated or personal, nor has it responded to a "pissed consumer" report, now 5 days since issued. User's recommendation: Bewareof health restrictions before purchase. The company is not responsive to contacts from purchasers for whom the device could cause harm.