Thermostat: Robertshaw Series 40
HVAC system: Split A/C with gas heat
Indoor unit: Bryant BEA 394dac024050
Outdoor Unit: I can not check this easy as I live in an appartment

Thermostat Pros: No batteries required. Pre-installed in my appartment.
Thermostat Cons: Simple temperature setting only, no further features

Click image for larger version. 

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Sorry for the poor quality picture, incase it is not understandable, the wires are:
* Green wire going to the G connector
* Red wire going to the Rc connector
* White wire going to the W connector
* White and yellow wire going to the Y connector