>>28274
You see the little silver object, leaning on the blue tablet. That's a communication device. Everybody is wearing it directly on the skin (most commonly on the wrist or the upper arm). It works as a communicator, is connected to the NET and can be scanned by the authorities to retrieve your ID or your health records.

(That's Sam's head by the way, from Happy Ending, This and other pics of mine can be found on Pixiv)