AGPtek A21 User Manual

Instructions for charging the player using a 5V/500mA charger.

Instructions for charging the player via a computer using a USB cable.

Describes the 1.5-inch TFT screen and its synchronous display capabilities.

Details on how to turn on/off the player and screen using the power button.

Explains the functions of the back button for navigation and returning to menus.

How to use the volume up button to increase the audio volume.

How to use the volume down button to decrease the audio volume.

Functions of the enter/menu/play/pause button for selection and playback control.

Controls for playing previous tracks or fast backward playback.

Controls for playing next tracks or fast forward playback.

Information about the Micro SD card slot and its supported capacity.

Lists the options available in the Music menu, including All songs, Artists, Albums, etc.

Accessing the music submenu for playback modes and sound settings.

How to find and play songs categorized by album names.

Adjusting repeat modes, shuffle, sound settings, and volume limit.

Instructions for tuning into FM radio stations and managing presets.

Features for voice recording, managing recordings, and setting recording parameters.

How to use the stopwatch function to time events.

Functionality to check the date using the calendar feature.

How to set the device's date and time, including format selection.

Adjusting screen brightness, backlight timer, and screensaver options.

Configuring sleep timer and power-off behavior based on inactivity.

Viewing player information and disk space details.

Options to format the device or restore it to factory default settings.

Troubleshooting steps for when the player fails to power on.

Solutions for issues related to the player's battery charging.

Steps to resolve problems when transferring files from a computer.

Troubleshooting connection issues between the player and computer.

Steps to diagnose and fix issues with audio output to headphones.