Drum Bass Speaker Voice Sound Amplifier Percussion Instrument AccessoriesSpecifications:Made of environmentally friendly ABS with rubber drum ring, durable, not easy to deform. This product converts the drum into a bass speaker reverb to increase the bass sound amplification. Concentrate the air in the drum cavity and create a compression effect inside the interior to make the bass part stronger. The effect produced is adjustable, you only need to adjust the tightness of the skin surface of the drum. Item Name: Drum Sound AmplifierMaterial: ABS, RubberSize: 17cm x 10cm x 10.6cm/6.69 " x 3.94" x 4.17 " (approximately)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Included:1 x Drum Sound Amplifier