Flat mounting 9V battery case designed for active pickup instruments such as guitar, bass, and ukulele. This prewired compartment provides a lowprofile installation option for replacing a worn or broken battery holder. Color: black. Battery not included. No metal contacts provided. Key benefits Lowprofile flat mounting design fits flush in instrument cavities and reduces bulk. Prewired inside the box for straightforward connection to active pickups or preamp circuits. Simple replacement accessory to restore power housing without modifying the instrument body. Includes mounting hardware for immediate installation. Features Function: 9V battery holder case and compartment cover for active pickup systems. Compatibility: Intended for electric guitar, electric bass, and ukulele models that use a 9V battery for active pickups or preamps. Color: Black for a discreet appearance inside the instrument. Contents: Wires are installed inside the box; battery not included; no metal contacts provided. Package includes one battery case and four screws for mounting. Typical use scenarios a damaged or missing 9V battery compartment on an electric guitar with an active pickup system. Install or restore a flatmount battery holder in a bass preamp cavity to secure a 9V battery and wiring. Retrofit an acousticelectric ukulele that uses a 9V supply for an onboard active pickup or preamp. What is included 1 piece 9V battery case with preinstalled wires 4 mounting screws Notes Battery is not included. No metal contacts are included with this case; verify compatibility with your instrument wiring and contacts before installation.