this device has been tested and is good working order

This device comes with all required screws

This device come with a box

The devices conected range specs
smoke alarm 10 year battery wi-safe 2
heat alram 10 year battery wi-safe 2
smole alarm mains powered wireless
heat alarm mains powered wireless
CO Alarm 10 year battery wi-safe 2
Wireless gateway Mains Powered wi-safe 2