Simplex 166-228 34 Ribbon for use with 4100 AnnunciatorSimplex 166 228 34 Ribbon for use with 4100 Annunciator Repeated operation of the appropriate acknowledge switch will scroll the LCD display showing activity in the sequence of occurrence. The tone alert also pulses to indicate the operation of any of the push button switches. Consult local code requirements for guidance in determining applications and location of the 4603 9101 LCD annunciator. Specifications: Weight 2 lbs Condition New Brand Simplex