This document is a product manual for the Chao Hua MP3 digital player, which introduces the product's features, characteristics, and usage instructions.
This manual provides step‑by‑step instructions for using the Chaohua MP3 digital player, including power on/off, navigation of menus, playback, recording, and USB file management. Safety precautions and battery handling are also covered.
Technical specifications, firmware upgrade procedures, and a FAQ section help users maintain and troubleshoot the device. The document includes a full table of contents and detailed hardware specifications. This manual is written in Chinese.
| Power source | One AAA alkaline battery |
|---|---|
| Internal storage | 128 MB / 256 MB / 512 MB NAND flash |
| USB interface | Standard Type‑A USB 2.0 (Full speed) |
| Microphone jack | 3.5 mm stereo mic jack |
| Display | 128 × 32 dot matrix LCD |
| Maximum audio output | > 5 mW per channel |
| Signal‑to‑noise ratio | > 90 dB |
| Audio frequency range | 20 Hz ~ 20 kHz |
| Total harmonic distortion | 0.01 % ~ 0.1 % |
The device is powered by a single AAA (七号) alkaline battery, providing up to 12 hours of MP3 playback.