1. The bottom subwoofer speaker, the subwoofer is designed to be pressurized to the ground, providing powerful bass enjoyment to the speaker 2. Acoustic guide hole design, the guide hole design reduces the energy loss of sound waves, and enhances the extended sound advantage of low frequency sound waves 3. 2.1 left and right channels, whether in or in the movie, the scattered footsteps and breath sounds can give you the feeling of being on the scene,4. USB power supply is convenient and easy to use. The USB power cord plug is compatible with most USB power ports, which is convenient suitable for the use of speakers 5. Multiple audio input support Bluetooth not only supports the commonly used 3.5mm audio port input, but also supports Bluetooth playback, SD card playback, U disk card playback, etc. 6. Wooden main box, quality. This speaker is made of wooden structure, which can effectively reduce resonance and , making the sound quality full and pure colour: black Material: wood + plastic size: 25x15x18.5cm Package Contents: 1 * main speaker 2 * sub speakers 1 * remote control Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.