You are bidding on a used Ecobee SI Smart Thermostat. 

This unit is in Mint condition and came off the wall working.

It only includes the unit and the original mounting plate.

You need to supply wall screws and look up the manual here:

(ebay does not support direct links anymore) Type into google: 227878827-SMART-Si-User-Manual-English

Bid with confidence and check out my immaculate feedback. Unit will be well packaged.