The YRD-ZWM-1 is a Z-Wave Plus communication module that allows the YALE Assure family of locks (YRD256, YRD426 and YRD446) to communicate wirelessly and be remotely controlled via a Z-Wave enabled automation system. 

It simply plugs into the module port under the battery cover of the lock. 
 

YALE ASSURE Z-WAVE NETWORK MODULE For Yale Assure Range

$169.90Price