The document introduces the features of the product in detail. The product is a high-performance, easy-to-use, and reliable machine learning platform. It can be used to build and deploy machine learning models.
This manual provides step‑by‑step instructions for operating the BBK BK-909 language repeat machine. It covers power options, battery safety, key functions, playback modes, recording, speed adjustment, and time configuration.
Additional sections describe how to switch between high‑fidelity and normal repeat times, perform automatic and manual repeat, use the line‑control remote, and resolve common issues such as no sound or short battery life. This manual is written in Chinese.
| Power supply voltage | DC 6V |
|---|---|
| Current consumption | 450 mA |
| Speaker impedance | 4 Ω |
The device automatically detects the battery level while charging and stops charging when the battery is full.
When the display shows “PLR9”, hold the Compare/Charge key for 2 seconds; when it shows “PLRU”, hold the Play/Record key for 2 seconds to toggle the mode.