Okay, my favourite piece of technology is my humidifier, the best purchase I have made for myself and to improve my mental health.
A humidifier is a device whose main function is emit water vapor to increase the humidity levels in the air and you can put different essences according to the function you need. I like it too much, because it's shaped like a cat and it's pink, it's so cute!
I use it in moments of stress of anxiety, it helps me a lot to relax. I got it a year ago we were in a full quarantine and with a lot of study and the life without him would be a bit more complicated when it comes to relaxing and calming anxiety, but it wouldn't be impossible.