1.100% team new and high quality2. Tuned port designed for bass drum3. Extend your low-end frequencies4. Add more punches to your audio5. Make the bass part more powerful, and the effect can be adjusted; Simply adjust the tightness of the drum surfaceThe enhancer instantly improves the sound of each bass drum. High wear resistance and excellent durabilityUsing method: first put in a protective sticker on the kick drum skin, and slice lengthwise on the inner diameter of the wheel to make a full wheel. The rubber part of the speaker is stuck on the skin of the drum and the installation is completeColor: White/Red/BlackMaterial: ABS + Rubber Size:Outer Diameter: 18.5cm Inner Diameter: 10.6cm / 4.17in Height: 10.5cm / 4.13in Weight: 190g / 6.7oz Package Contents: 1 x Amplifier Bass Drum1 x Protective StickerOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm.