This is a document that describes the features and characteristics of a product. The product is a mobile phone. The brand name is Xiaomi. The product name is Mi 11. The model number is 2101113D.
This manual covers the main features of the Sampo MK-521C and MK-531C MP3 players, including battery installation, button layout, LCD display, and supported audio formats. It explains how to power the device on and off, adjust volume, lock the keyboard, and use the favorite‑song function.
Additional sections describe FM radio tuning and recording, voice file playback, system settings such as playback mode, sound effects, contrast, backlight, power‑off timer, and language selection. The guide also provides technical specifications, driver installation steps, common troubleshooting tips, and safety and maintenance information. This manual is written in Chinese.
| Dimensions | 73.5mm × 26mm × 20mm |
|---|---|
| Weight | ≈25 g (without battery) |
| Battery | 1 × AAA 4 V alkaline |
| Storage Capacity | 128 MB / 256 MB |
| Playback Time | ≈8 hours (128 kbps MP3) |
| Supported Audio Formats | MP3, WMA, WAV |
| Operating Temperature | -5 °C to 40 °C |
| Signal‑to‑Noise Ratio | 85 dB (MP3) |
Short‑press the power key to turn the device on; long‑press the same key to turn it off.
Press the ‘+’ button to increase the volume and the ‘‑’ button to decrease it.
Check that the battery is correctly installed with the proper polarity and that the HOLD lock switch is in the OFF position.