AD16-22SM Flash buzzer with led smart electronic white shell buzzer plastic round head buzzer type : AD16-22SM place of origin : Zhejiang Province,China (Mainland) brand name : NIN mounting diameter : 22mm color : white green red yellow blue material : plastic frequency : AC 50-60HZ lamp voltage : DC/AC 6V 12V 24V 36V 48V 110V 220V 380V continuous operating life : more than 30000 hours IP rating : IP65
