Ibanez 5AJB01F Acoustic Battery Output Box
Genuine Ibanez Acoustic battery and output jack box
Powers up with 3 Volts - 2 x 1.5V AA batteries.
Found on Ibanez Acoustics and Acoustic Basses
Has jack and XLR output sockets
NOT to be confused with the 5AJB05F which looks the same but houses one 9v battery and is NOT compatible.
Complete with 4 mounting screws.