The SATEL SIGNALIZER SP-4001 R (RED) is an outdoor alarm siren with optical signaling via LED diodes and LED strips. It offers alarm signal selection and has a polycarbonate shell with dimensions of 148 x 254 x 64 millimeters. The environmental category is III and it features a metallic inner shield. It is equipped with a piezoelectric transducer for acoustic signaling and provides protection against tampering from opening and disconnection from support. It does not support emergency power supply from a battery.