Here is Manual. PDF format
https://forwardthinking.honeywell.com/related_links/thermostats/tseries/Lyric_T6_Pro_Wi-Fi_Installation_Instruction_-_33-00181.pdf
https://customer.honeywell.com/en-US/Pages/Product.aspx?cat=HonECC+Catalog&pid=TH6210U2001/U&category=T6+Pro&catpath=1.3.1.4.82&rank=3&v1=Sort.1.Product.Rank&asc=1
Owners Manual is listed here