3D print and build your own functional Pipboy 3000 using a Raspberry Pi and Adafruit 3.5" PiTFT. The pypboy python program for the Raspberry Pi features OSM for map data which allows you to browse your terrain rendered in glorious retro green graphics.
It features an audio amp + speaker with the actual score and background music from Fallout 4. An analog rotary switch lets you switch between different modes in the pypboy python program.
The 3D printed enclosure has cutouts for most of the IO ports for the Raspberry Pi, so you add your favorite peripheral like a WiFi dongle, keyboard and mouse.
The 2200mAh battery can be recharged over USB and fits inside an aesthetically looking cylindrical case.
Details like the super bright yellow LED, rotary encoder, speaker grill and faux gauges really make this look like a Pipboy 3000 Mark IV.