The NATIONAL TIME C2 Synchronized Series is a low profile strobe or horn/strobe combination that offers dependable audible and visual alarms. The C2 Series horns provide selections for high/low dBA, continuous/code 3 temporal horn sound settings for high frequency tone, mechanical tone and chime tone. In addition the horn can be selected for a slow whoop tone operation. The high to low dBA selection will reduce horn output dBA and is used in environments with low ambient noise levels. The high frequency (2400 Hz) selection is recommended for use in remote signal applications.