Practical Voice Playing Box: Our sound playing box operates with 3 batteries (not included), providing extended usage time. Depending on audio length, battery life can last for years. The device features ample memory to store multiple MP3 files for continuous loop playback. You can save your preferred audio messages or music. Audio files remain secure and do not need re-uploading when batteries are replaced. Easy to Operate: Connect the audio playing box to a computer using the USB cable. Once connected, it appears as a USB drive on the computer interface. Simply open the drive, add desired audio files, and safely eject after transfer. To play audio, turn on the power switch, adjust volume using the control button, and press to start playback. Press the button again to switch between audio files. Nice Gift Choice: Add a memorable touch to your gifts with personalized content. The sound box can be integrated into stuffed toys, gift boxes, and more. Recipients will be delighted to hear personalized messages or music upon opening their gift, creating lasting impressions for friends and family. Wide Application: This voice audio playing box is suitable for various uses such as sound frames, musical greeting cards, interactive toys, custom audio buttons, and festive gifts. Play personalized music or greetings for occasions like Christmas, New Year, birthdays, and other celebrations to enhance emotional value. The sound playing box has 16M memory, capable of storing up to 960 seconds of MP3 audio files or 2400 seconds of WMA files. Dimensions: 5.8 x 4.7 x 2.5 cm / 2.28 x 1.85 x 0.98 inches. USB cable length: approximately 22.3 cm / 8.78 inches. Features a volume adjustment button; compact and portable design. Note: Product appearance may vary slightly due to different manufacturing batches, but this does not affect functionality. Color: White Material: Plastic Package Contents: 1 x Sound Box, 1 x Data Cable Note: Light reflection and differences in display screens may cause slight variations between the color shown in images and the actual product. Measurement tolerance is +/- 1-3 cm.