From the Facelesstech blog:

Pocket Pi

So if you have been following my blog lately you may have noticed me rambling on about trying to get a Xbox 360 chat pad and an ps3 keypad working with a raspberry pi to make a portable terminal. I have finally finished my quest so join me below to see how I did it

Hardware

• Raspberry pi zero w
• 3.5″ waveshare clone
• Rii Mini 518 Bluetooth keyboard
• Bluetooth dongle
• Power bank board
• 2600mAh lipo battery
• DIY USB hub
• DIY interface PCB for screen
• Acrylic
• Various stand-offs

Raspberry pi zero w a 3.5″ screen a power bank board and a bluetooth keyboard is that makes up this pocket terminal.