Legrand siren, supply voltage: 24 VDC, dimensions (diameter): inside 60 mm, outside 73 mm, length 103 mm. Current consumption: 516 mA, power 12 W, for acoustic signaling, volume 100 dB at 1 m, continuous operation max. 200 hours, protection class IP 30 - IK 05, color: black, for surface mounting or front panel installation.