OX QL Series · Recording Card

Record everything.
Program anything.

A 125 × 150 mm recording card just 5.5 mm thin, capturing up to 80 hours — fully programmable in C++.

QL-125 · 80H

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80hRecording
5.5mmThin
125×150Millimetres
C++Programmable

Explore the QL Series Start building ›

The brain inside

Powered by ESP32‑C3.

A general-purpose programmable chip drives every OX recorder. Write your logic in C++, flash it over USB‑C, and the card behaves exactly how you tell it to.

RISC-V single core Efficient, low-power compute purpose-built for embedded recording.
Programmable in C++ Full control of triggers, schedules, and on-device processing.
USB-C flashing Compile, connect, and deploy over the same reversible port.
Built-in Wi-Fi & BLE Wireless connectivity ready for your application.

80h

Continuous recording

5.5mm

Total thickness

125×150

Millimetres

C++

Fully programmable

Why OX Recorder

Built for those who build.

Yours to program.

Write directly to the card in C++. Register a callback, pump it from the loop, and stream live PCM straight to the SD card. The recorder behaves exactly how your code says it should.

record.cpp

OXAudioManager audio;
OXFileManager fm;

audio.onAudio(onAudio);   // PCM -> SD
audio.begin();             // default pins
audio.poll();              // pump in loop()