... MS-190, MS-290, MS-390 motor siren motor sirenDetailed Product DescriptionElectronic siren series: Unique and scientific design, perfect ... aux, yelp, hi-lo, wail-1,wail-2, siren, horn, super-siren. Yelp relay. Tool. Build in LID display, sound ... amplifying. Type: Plastic type and metal typeVoltage: DC12V, DC24V, AC110V, AC220VPacking: Colourful box ...