How to map this in a device DB?

Gregg pointed me in the direction of this very interesting Chinese device. I suspect we will have to add some new properties in the DDWG Core Vocabulary in order to properly describe this.

This is a screenshot:

Taken from this site: http://mobile.139shop.com/mobile/75/5673.htm

We’re thinking of giving a bounty to the first person who can explain what the added “gadget” on the left side of the device is for.
Is this some special equipment for ice skaters?