The Djack 3.1CH Bluetooth Speaker System Woofer 903 in Black is a versatile and powerful audio system designed to provide high-quality sound for home entertainment. Here's a detailed description of its features:

1. **3.1 Channel Configuration**: The system consists of three main channels and a subwoofer. The three main channels typically include a left speaker, a right speaker, and a center speaker, while the subwoofer is responsible for reproducing deep bass frequencies. This configuration delivers a balanced and immersive audio experience, ideal for movies, music, and gaming.

2. **Bluetooth Connectivity**: With built-in Bluetooth technology, the system allows you to wirelessly stream music from your smartphone, tablet, or other Bluetooth-enabled devices. This eliminates the need for physical connections and provides convenient access to your digital music library.

3. **USB and SD Card Playback**: The system features USB and SD card slots, allowing you to play music directly from USB flash drives or SD memory cards. This feature enables easy playback of MP3, WMA, and other digital audio files, giving you additional flexibility in accessing your music collection.

4. **FM Radio**: The system includes an FM radio tuner, allowing you to tune in to your favorite radio stations and enjoy music, news, and other content. The FM radio functionality adds versatility to the system, giving you access to a wide range of audio sources.

5. **LED Display**: The system is equipped with an LED display that provides easy-to-read information about the current audio source, volume level, and other settings. The display enhances the user experience by providing clear and intuitive feedback.

6. **Remote Control**: The system comes with a remote control that allows you to conveniently adjust volume levels, change audio sources, and control playback from a distance. This enhances the user experience by providing easy access to essential functions without the need to manually interact with the speakers.

7. **Sleek Design**: The system features a sleek and modern design with a black finish, making it an attractive addition to any home entertainment setup. The compact size of the speakers and subwoofer allows for easy placement in your living room, home theater, or entertainment area.

Overall, the Djack 3.1CH Bluetooth Speaker System Woofer 903 in Black offers a complete audio solution for home entertainment, combining powerful sound output, versatile connectivity options, and stylish design. Whether you're watching movies, listening to music, or enjoying radio broadcasts, the system delivers an immersive audio experience that enhances your enjoyment of multimedia content.