DSP: built-in high-fidelity digital audio DSP module, equipped with high-quality circuit to realize the expansion of reverberation chorus, delay and other sound effects, making the sound more flexible, parent, broad and beautiful. Howling Suppression: this product has a powerful automatic noise suppression function, the use process does not have to worry about the problem of howling, let you concentrate on deduce without distraction. BT Connection: connect with the audio signal of the BT device through the guitar, and then add the vibration mode or sound by the guitar itself. The box plays guitar accompaniment music or songs, and you can also download various types of audio files through the Internet platform to play with the guitar Resonant Function: the flat speaker attached inside the guitar makes the guitar box vibration and sound to realize DSP sound effects, increase the resonance volume of the piano box, and play the guitar box can be used as a small speaker. Charging Interface: type-c charging interface above the pickup panel, the charging mode is convenient, simple and universal. Power Supply: 1x3.7V 2200mAh rechargeable battery (NOT included) Item Size: 92.5x69.3x57mm/3.64x2.73x2.24in Item Weight: 131g/4.62oz The silk screen printing and some parts details on the product may be slightly different, which will not affect the use. Color:As Shown Material:plastic Package Contents: 1 * Guitar Pickup Kit Only the above package content, other products are not included. Note: Light reflection 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.