TG4C**REQUIRES BOG-PS40C ADAP UPC 765368200652• 4 types of tones: steady, pulsed alarm, slow whoop, and chime • Tones triggered by external contact closure (momentary or long duration) • Choice of continuous generation of tones or two-burst operation (except for steady tone) • External audio signal can pass through TG4C and is suppressed during tone generation • Adjustable tone level and pitch • 600-ohm output. **REQUIRES BOG-PRS40C ADAP