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. The low frequency (factory) selection is recommended for use in evacuation signaling application. The C2 Series horns are factory shipped for code 3 temporal selection. The C2 Series strobe provides a low operating current and a minimum flash rate of 1Hz across the rated input voltage range. The C2 candela intensity come in 15CD, 15/75CD, 30CD, 60CD, 75CD, 110CD or 177CD versions. The C2 Series easy slide mounting system provides convenient installation and device testing operation. The C2 Series operates from the synchronized outputs on the National Time Synchronized Series, Fire Alarm Control Panel or Notification Appliance Control Panel or from the Remote Power Supply providing individual synchronized horn and strobe operation on the same 2 wires. The C2 Synchronized Series comes standard with the 4" mounting plate. The mounting plate will mount to a 4" square box, a 2-gang masonry box, a 2-gang switch box, a single gang masonry box or a single gang switch box for flush mount appliances. For surface mount appliances use the SG-CBB surface box. The C2 Synchronized Series appliances are UL 1971 listed for use with fire protective systems.