- Versatile Power Options : This device features a USB power supply interface, allowing it to be powered by a mobile power bank or USB charger through your phone's data cable. It is also compatible with a 3.7V lithium battery and a 5V USB power supply. - Dynamic Playback Features : Enjoy automatic MP3 playback on startup, indicated by a red LED light that updates during playback. It supports U-Disk playback (32G tested) and TF card playback (16G tested). If no TF card is detected, it automatically switches to U-Disk mode. Both devices can be manually toggled as per your preference, guided by the user manual. - User-Friendly Installation : Equipped with TF card and U-Disk playback modes, this product is designed for straightforward set-up—no soldering required. The modular design allows for easy modifications and replacements. - Exceptional Sound Quality : Experience superior audio with an integrated 2W mono amplifier (5V power supply driving 3W). It connects directly to a speaker, ideally suited for a 4-ohm 3W speaker. The gold-plated 3.5mm headphone jack allows seamless connection to headphones or external audio systems. - Practical Applications : - Perfect for home use, providing clear sound for music and media. - Ideal for outdoor activities, as it can be easily powered with portable chargers. - Great for educational purposes, enhancing presentations with high-quality audio output. This device combines functionality and quality, making it an essential addition to your audio setup.