Amazon Halo is a smart band that tracks your body fat, measures your movement, analyzes sleep, and how you sound to others with the Tone feature. With all this personalized data, Halo surprisingly puts privacy above everything else.

The screen-less smart band lets you download or delete your data anytime. The company also promises it won’t sell your data to any third-party entity. All the tracked data is only used to tailor health tips and recommendations for you.

Lastly, the Tone feature, which analyzes your sound has a physical button where you can mute its microphone anytime — a nice protective measure in case you don’t want to be recorded.