# Supplies The following hardware is required to use the embedded R2-D2 Vocalizer: * Teensy 4.1 — [TEENSY41\_NE or TEENSY41](https://www.pjrc.com/store/teensy41.html) * Teensy Audio Adapter — [Rev D](https://www.pjrc.com/store/teensy3_audio.html) * (Optional) Micro SD Card — [V30 or faster](https://www.sdcard.org/developers/sd-standard-overview/speed-class/) required for WAV playback * (Optional) SD Card Reader * USB Micro B cable — Must support data transfer * Power Supply * [Command System](/r2d2/platforms/embedded/commands.md#command-system) — Required to send commands to the Teensy * Amplifier — Required to boost the output from the Teensy for playback through a speaker * Speaker Optionally, Trevor Zaharichuk offers [premade boards](https://grnwave.com) to simplify the assembly process. Trevor will generously donate $10 to FIRST for every board sold. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.humancyborgrelations.com/r2d2/platforms/embedded/supplies.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.