This is a 6xAA size battery holder, 6 AA cells in series
3 Alkaline AA cells in series will give you from 9v full down to about 4.8v empty.
This holder is in a "panel mount" format, designed for inserting into a rectangular cutout in your project, with a typical "pull catch" door.
All of our products are shipped from Christchurch, New Zealand using CourierPost for NZ, and Airmail for international.
