LG smart TVs have been found to log and upload data about owners and their homes, even when offline or on standby mode. The TVs scan Wi-Fi networks for nearby devices, record audio logs through their microphones, and use audio and video sampling to recognize what's being watched. This data is fed back to LG Ad Solutions. The issue is not unique to LG, as other smart TV manufacturers also use Automatic Content Recognition (ACR) technology to track viewing habits.