This device is way into the future.
Its a computer you wear around your neck like jewellery but more refined and larger.
Instead of the future being wet wired, the option to wear a neck torc is a good way to feel interactive with the computer but also immersed in the real world.
It gets its juice from a station in your house using short range wifi electricity.
It has twin wifi antennas, detachable and upgradable as better networks are made.
Its cpu is detachable and on the back to disperse the heat, however in the future, they are not as hot anymore.
The stereo laser projectors are so powerfull now and refresh is insane that when they cross over each other in space they make a visible screen in thin air.
Control many functions with speech recognition or the motion sensors at the front interact with your movements precisely enough now for very complex hand gestures, as well as type on a invisible keyboard projected from the lasers on a flat surface or in midspace.
Naturally you can program it to do anything a computer can do.
It has built in GPS Explorer, Its a mobile phone with a microphone and vibrate
Its wifi antennas can project its lasered display to close proximity plasma screens and lcds with WIFI-VGA
It monitors your bio rythyms etc and can alert you to changes
It uses massive amounts of ram to hold its system and backs itself up to a hard drive via wireless every set time.
It can run any OS and is first booted and configured from a wireless browser interface administration webpage, or a blue tooth connectivity, or usb etc
I would try and communicate with him if we were both wearing that device.