Samsung Galaxy S23 (6.1-in) Smartphone (SM-S911U) Unlocked - 256GB/Phantom Black Condition:Grade A - 90%+ Battery the sensor tells the thermostat

the sensor tells the thermostat what the temperature is in the room where it’s placed and the thermostat uses that reading to control when the system turns on or off to keep that room the temperature you like

It's both Apple and UL certified for safe

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Samsung Galaxy S23 (6.1-in) Smartphone (SM-S911U) Unlocked - 256GB/Phantom Black Condition:Grade A - 90%+ Battery the sensor tells the thermostatThe Samsung Galaxy S23 (6. 1 inch) Smartphone. Model: SM S911U. Phantom Black version with 256GB Storage. Please Note: This is a Unlocked device and can be used on GSM and CDMA carriers such as T Mobile, AT&T, and Verizon Wireless in the USA. Device is not cleared to use with international carriers. The IMEI number of each device is recorded and will be tracked for customer service reasons. Failure to return the correct item or damage received will be