This is a pickup for a cajon made by ARCO. It is inserted into the cajon body through the sound hole. The output terminals are line out (phone x1, XLR cannon x1). It can be used with phantom power via a cannon cable from a mixer or DI, but it can also be battery-powered. The phone jack also serves as the power switch, allowing for flexible use depending on the equipment during the performance. *Note: A hole is made on the left side of the main body to allow the battery connection terminal to be exposed. (See photo 3) Dimensions: H9.5cm W6.5cm D3cm Operation confirmed.