The Menics MPZ-56A 80dB buzzer is made to be used with the MT5C series of 56mm diameter tower lights. Voltage: 24V AC/DC Current draw: 30mA. The MT5C series has a maximum of 5 tiers, so it cannot be used with 5 stack tower lights. On a 4 stack tower light, this buzzer would be considered the 5th tier. Note: This buzzer does not come included with the tower lights.

Menics 24V Buzzer for 56mm Tower Lights