Used as a pickup for cajons, floor-standing djembes, etc. Since the power supply was the PA's phantom power, the batteries have not been replaced since they were purchased. ⭐︎Please replace the batteries yourself after purchase.⭐︎ Product Description ● Pickup system for use inside a cajon. No installation or modification is required, so you can easily enjoy high-performance pickup sound with any cajon. Size: 6.1 cm x 11 cm x 3.6 cm (protruding part) Weight: 350g Batteries used: 006P manganese or alkaline batteries. It is a compact type effector size. ● Equipped with a preamp plus DI, it is possible to use both the cannon microphone output and the jack output for the shield at the same time. Connection to the mixer can be done using phantom power (48V, 3mA) in the same way as a general studio condenser microphone. Also, if you leave the empty jack on the horn jack of the main unit, the XLR output will be available with the battery power inside the case. Batteries used are 006P, 1 9V square battery. When using batteries, alkaline batteries can last for 3 months with 6 hours of use for rehearsals and performances, 2 days a week, and manganese batteries will last about 1/3 of that time. We recommend the phantom power adapter BEHRINGER PS400 MICROPOWER.