The device you wake with is not unlike a wrist watch, with buttons below the flat display screen (full, if small keyboard as opposed to the concept picture to the right). It's easy to take on and off, though extremely hard to have accidentally fall off. It is steamlined and lies flat against your arm, though the screen can be flipped up and towards you.

Comm functions

Video, voice, and text options are possible. Each individual wristcom, once imprinted on a character, has a unique ID other users can assign their name to (this ID is your Scribbld user ID). This number is identical to the one tattooed on the back of your character's neck, and even if they have to obtain another wristcomm later—the new one resets its number to theirs.

The voice and video comm functions more like a radio than a minicomputer. Broadcasts to the network that are not private to other users (multiple users on private or filtering is possible) will broadcast realtime over the comm like a radio message. As such they will hear all network chatter, so please keep this in mind when threading and keep it from getting too chaotic.

Characters may turn their wristcomms off via a power button should they not wish to be disturbed. If they receive a direct/private message while the device is off, a red light will pulsate to get their attention and if it is on their wrist they'll be compulsed to look at it as if they heard something.

Text messages are stored like email and characters can respond at their leisure. Video and voice is treated as realtime and, at the moment, does not appear to be stored anywhere. This means characters are ICly responding in realtime. If they miss something--they miss something because they weren't around their device, it was turned off, etc.
 

Hacking and programming is possible, but exceedingly difficult even to geniuses at first given the unknown language it seems to operate on.

Other functions

Map: a black grid showing all other active wristcomms within a mile's radius is accessible. They will appear as slowly blinking red dots. It is possible to expand upon this base program once an appropriately skilled character becomes familiar with the devices. Until then it works merely as a waypoint system.

Radio signal: if a character is appropriately (superhuman) sensitive to radio frequencies they might be able to detect something coming from the devices on a regular pulse. Check with mods before presuming they are able to.