This compact 12V DC siren delivers 110 dB/1m alerts to cut through noisy areas and prompt timely evacuation. Choose from ambulance, pumper and police tones to match the emergency scenario. Energy-efficient 100 mA draw keeps your alarm system reliable without heavy power demands. Surface-mount design and universal wiring make installation quick and compatible with most fire alarm setups.

Model	QS-H4A
Voltage	12 V DC
Rated Current	100 mA
Sound Pressure Level	110 dB (measured at 1 m)
Available Tones	Ambulance, Pumper, Police car
Dimensions (L×W×H)	16.0 cm × 12.8 cm × 4.7 cm
Net Weight	0.25 kg
Mounting Type	Surface protruding mount with screw holes
Power Source	DC hardwired (12 V supply)