AppleCare+ provides unlimited coverage against accidental damage caused by use.Spatial audio works on HomePod (2nd generation) and HomePod (1st generation) when playing compatible content through supported apps. Not all content is available in Dolby Atmos.Creating a HomePod stereo speaker combo requires using two HomePod speakers of the same model, such as two HomePod minis, two HomePods (2nd generation), or two HomePods (1st generation).Requires multiple HomePod speakers or AirPlay-compatible speakers running the latest AirPlay software.Accessories that support HomeKit or Matter are required. Smart home accessories are sold independently.Voice recognition detects smoke and carbon monoxide alarms and notifies you when an alarm is detected. Relying on voice recognition is not recommended when you are at risk of harm, are at high risk, or are in an emergency situation. The voice recognition feature requires the use of an updated version of the Home app framework, which is rolled out through a separate update of the Home app. All Apple devices must be running the latest version of the software to have home access.Temperature and humidity sensing features are optimized for home environments with ambient temperatures of approximately 15º C to 30º C and relative humidity of approximately 30% to 70%. Accuracy may decrease when playing audio at high volumes for long periods of time. HomePod mini will calibrate the sensor immediately after starting up. The process takes time and the results will be displayed later.