You have it written down incorrectly, or the vendor is just ignorant. It is "RoHS" which is a Eurpoean manufacturing standard designed to reduce 5 specific toxic elements in the manufacture of electronics.
Eventually, all electronics will conform to this, as standards tend to cross the ocean, and no one wants to be seen as "green unfriendly" these days.
It is "RoHS", bot "RSH", there is no such thing as RSH.
Mitch
AVAYA Certified Expert