With 5.5mm power interface. 100W mono subwoofer, outstanding effect. Adopt quality electronic components, good performance. Adopt NE5532 front-facing OPAMP to buffer, normal amplifier. Can use switching power supply, laptop switching power supply, battery or car power supply, etc. Quality power amplifier chip, DC single power supply 8-25V working voltage, 50W (left channel) and 50W (right channel), two of channel output. Colour:green Material:PC+metal Package Contents: 1 x Module 1 x Paster 1 x Screw 1 x Cap 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.