It works with 3 AA batteries (not included). It can be controlled using the phone app and has up to 45 animations and 70 fixed images to choose from. You can also do it yourself and upload your own photos. If you don't want to use a phone, with a motion sensor in the mask you can even transform faces by simply shaking hands. You can add scrollable photos or send text messages yourself in this mask. If you play music in the app or talk with the LED mask (start the microphone in the application), the volume equalizer will be coldly displayed in the face mask. Comfortable LED mask to use: It is not very thick and comes with a silicone pad for the eyes (very comfortable). You can breathe normally, see things normally and adjust the size of the mask strap.