Check Your HVAC Compatible/Incompatible in Below List. (Note: if use VINE theremostat to control TWO WIRE System, please add an AC Adapter)
Wi-Fi Smart Thermostat Model: TJ-550
Get Phone App in the Google Player or IOS App Store, search and download “Vine Thermostat†app, not "Vine Smart Control" app.
Vine 2nd Gen Smart Programmable wifi thermostat model TJ-225B Vine Smart Programmable wifi thermostat model TJ-610E Vine Smart Programmable wifi thermostat model TJ-919E Vine Smart Programmable wifi thermostat model TJ-550 Vine TJ-550 thermostat+AC Adapter
Dimensions 4.33" x 3.85" x 0.92" 4.84" x 3.34" x 1" 4.84" x 3.34" x 1" 3.54" x 3.54" x 0.98" 3.54" x 3.54" x 0.98"
Wi-Fi Connectivity 2.4GHz 2.4GHz 2.4GHz 2.4GHz 2.4GHz
Smart Alert ✓ ✓ ✓ ✓ ✓
Color display ✓ ✓ ✓ ✓ ✓
Touch screen ✓ ✓
Keyboard Lockout ✓ ✓ ✓ ✓ ✓
Compatible with Alexa
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Item# : SPM9164997823
Model # : TJ-550