The holder is made of plastic and snaps open and closed. You can tape it closed if you need more security than just the plastic snap. A nice extra is the on/off switch up top. We had the factory place a 2mm JST PH connector on the end but you can cut it off if you want to solder on a different connector.
This item does not include any 2032 coin cells. We do stock those separately, so if you want batteries to go with this, please pick up two of them!