Cayla uses a microphone to listen to questions, sending this audio over Wi-Fi to a third-party company that converts it to text. This is then used to search the internet, allowing the doll to answer basic questions, like "What's a baby kangaroo called?" as well as play games. In addition to privacy concerns over data collection, security researchers found that Cayla can be easily hacked. The doll's insecure Bluetooth connection can be compromised, letting a third party record audio via the toy, or even speak to children using its voice.
The Electronic Privacy Information Center has said toys like this "subject young children to ongoing surveillance...without any meaningful data protection standards." One researcher pointed out that the doll was accessible from up to 33 feet away -- even through walls -- using a bluetooth-enabled device.