This is simple 2 WAY radio chat device built from Digispark (ATTINY85) + FS1000A + MX-PM-5V modules. Allows "IRC" like radio communication between several PC connected to 433MHz/315MHz frequency. This ...

It might not seem too impressive these days, but when microcontrollers with hardware USB support were more expensive and rare, the VUSB library was often used to create USB devices with an ATtiny85.