Wall mounting model: the direction of horn is fixed.
SS316 Material in all: including Horn, body, bracket, screw, nut, installed accessory.
Every stage tone can be chosen freely
Sound recording or custamisation
Bult-in volume control
2 controlling switch SW1 & SW2
When the power is on, stage1 is working.
When the power and sw1 is on, stage 2 is working.
When the power and sw2 is on, stage 3 is working.
When the power and sw1 & sw2 are on, stage 4 is working.
4 stages of alarm tones: tones can be freely chosen in every stage.