Swaggers Metal Automatic School Timer and Bell (color -BLACK )

Swaggers Automatic School Bell Timer System  About this item Made to control ringer/sirens in Schools/Colleges/Factories/Offices Can be programmed as needed. A user can program various timings of the periods, recess Separate bells/day programming for Monday to Thursday and Friday/Saturday Length of each bell, can be controlled separately It has a crystal-clear display, which helps the user to read and set various parameters easily