Pickup with Microphone Speaker Amplifier for Cajon Drum African Drum and Box Drum Feature: 1.Pickup for Cajon drum African drum and box drum 2.Unique Designed for the size, shape and sound of the Cajon instead of traditional microphone preamp 3.Easy to install with wrench and not damage the finish of the instrument including soundhole preamp and a MIC module 4.SIZE: Length=13.5cm , hole size 11.6mm (for reference only) 5.color: black Package list: 1* pickup