... ,16ohm SPL:120 waterproof Product Description1,Waterproof Horn Speaker: HS-503 2,China Direct Supplier 3,Horn Speaker for Car Alarm ... Security System /outdoor/indoor 4,Size:125mm(Diameter)*118mm(Length)5,Rated Output Power:10W~20w6,Impedance: 4 / 6 / 8 / 12 ... ,ODM/OEM Service 11,RoHS hot sale10w indoor speaker HS-503,China