Quantity   Component name
1 × Raspiaudio MIC ULTRA+ This one includes a mic and sufficient speakers in a small form factor.
1 × Generic USB mic I like to have this as a backup in case there's trouble with the raspiaudio module
1 × Generic Linux capable WiFi USB adapter I use an Edimax EW-7811Un V2 with RTL8188CUS chipset giving people a hotspot to connect to
1 × RCWL-1601 ultrasonic sensor For additional obstacle detection, I found the camera of the wavego on its own hard to configure and got much better results if I use it in tandem with the ultrasonic sensor
1 × Waveshare WAVEGO RPI4b Obviously the most important component here,