1.       22mm, 30mm diameter hole, IP00, IP54

2.       Sound:- Electronic, Magnetic, IP54 Electronic, Standard, Loud, Loud with volume control, standard with volume control.

3.       Voltage Rating: - 6V AC/DC, 12-24V AC/DC, 35-48V AC/DC, 100-110V AC, 200-220V AC, 100-110V DC.

4.       Color: - Black.