Vstar security is famous manufacturer for hardwired outdoor strobe siren, piezo siren, burglar alarm systems, hardwired alarm systems. Vstar security provide wide-range of outdoor strobe siren, Hardwired Outdoor Strobe Siren Model:VS-YSGJH-A Main Features including Highly resistant PC housing, UV prevention, Twin piezo sounders with 120db at 1M, Single piezo sounder is optional, SAB/SCB function available, Positive/negative siren trigger, Battery backup (included), Len corlors in Red, Orange, Blue, 2 way tamper switch protection, LED diagnosis indication, CE Approved.