The Z-DSD37-ZWUS from Aeotec Aeon Labs is a Z-Wave range extender meant for the Alarm.com security system. It works by receiving the Z-Wave signal and then repeating it to other Z-Wave devices on your networking, increasing network accuracy. An RGB LED indicates whether the repeater is connected or not.
The unit also amplifies the signal to help improve network reliability. It’s small and compact design means it won’t block neighbouring power outlets. In addition to being controlled through the Z-Wave network, it comes with a wired switch for local controllability.