This useful kit includes all the features you would expect from a professional burglar alarm. It uses an IC circuit and has an exit time delay to allow you to leave your home before the unit is armed an entrance delay to allow you to disarm the unit when you return home an automatic horn cutoff after a period of time an automatic reset circuit and of course N.O. and N.C. loops to allow you to use your choice of optional sensor switches such as reed switches snap action switches etc.