Features: 1.DSP chip sound, tuning knob, 12 kinds of sound effects, eliminate the original sound, live singing, one-click avoidance, avoid real-time monitoring, large-capacity battery. 2.Self-developed dual-chip, powerful DSP audio dual-chip, better stability, signal seal, audio clear and no delay, comprehensive upgrade, shocking, let the sound better 3.The surface of the shell is made of metal lacquer sand, matte feel, scratch-resistant, delicate touches, giving you a meticulous sensory experience. Notice: 1.Please allow 1-3mm to be different due to manual measurement. 2.Because the exposure is different and the light is different, the image cannot display the actual color of the item. Thank you for your understanding. Size:138*110mm Package List: 1 x Sound card 2 x Audio cable 1 x Charging cable 1 x Instruction manual