Quantity   Component name
1 × Raspberry Pi Zero 2 W Main controller. Runs the Hayes-compatible modem firmware, WiFi networking and BBS connections.
1 × OLED – 128×64 Displays modem status, IP address, WiFi signal and connection information.
1 × I2S audio amplifier Drives the internal speaker for dialing, handshake and modem sounds.
1 × Small speaker Reproduces dialing tones, carrier and modem handshake audio.
1 × Status LEDs PCB Front-panel indicators for WIFI, AA, OH, SD, RD, TR, CS and CD.
1 × Rocker power switch Physical power control.
1 × USB OTG interface Provides the serial connection used by modern computers.
1 × Custom 3D-printed enclosure Multi-part enclosure and front panel designed specifically for RetroBox Modem.
1 × MAX3232 TTL-to-RS232 level converter Provides proper RS-232 voltage levels for connecting RetroBox Modem to vintage computers through a standard serial interface.