Here is a set of devices that can protect your privacy when using your smart speaker or mobile phone. Pozio lets you control when your smart devices can listen to your conversations. It uses digital signal processing technology to to block the microphones on your devices to record and process sound.
The Pozio Cradle fits most smartphones on the market. It not only offers wireless charging but also blocks listening. It has a manual on/off switch on top. Pozio doesn’t store any information and won’t connect to the internet. You can find this project on Kickstarter.