*Characteristics
Stainless steel anti-loose screws
1.6mm galvanized steel enclosure, gray powder coated, dustproof, moisture-proof
20 watt speaker amplifier
Power LED light
Overload protection with current limiting and thermal shuliown circuits
Modular PCB
Surge protection for power supply
Available for 110VAC or 220VAC
Adjustable speaker volume from the front panel
With power supply and speaker amplifier
Address setting, automatically adjusting speaker volume by measuring ambient noise
Two DI & DO for control