Indent Item - Add 2-4 days to standard delivery time This prototyping board provides holes for mounting rotary switches, toggle switches, LEDs, potentiometers, batteries for power and a small speaker (included) to keep your prototype neat and tidy. Once you've mounted the hardware pieces required for your project, you solder their leads to a single-in-line header socket, ready to be breadboarded. Three separate battery compartments are provided to deliver different supply rail voltages if required. They can be ganged together to supply a total of 12V DC. Includes five instrument knobs, battery terminal hardware and a thumb knob to suit tuning gangs. - 1280 terminal holes - 300 distribution holes - Size 228(L) x 190(W) x 20(H)mm