Siren - 1500mm, IP65, IK07 Surface mounted moisture resistant luminaire. Polycarbonate body and diffuser with stainless steel diffuser retaining clips. Options: S - Switch Dimming D - Digital Dimming (DSI) A - Digital Addressable Lighting Interface (DALI) H - HFR Analogue 1-10v C - Bi-Level Dimming (Corridor Function) RLI - Reacta-Link, Wireless Enabled Luminaire RC - Reacta-Control, Wireless Enabled Luminaire LE3 - Lithium Standard Emergency 3 Hour LS3 - Lithium Selftest Emergency 3 Hour LA3 - Lithium Autotest Emergency 3 Hour TRS - Tamper Resistant Screws TRS INSTALL KIT - Tamper Resistant Compatible Screwdriver Heads