Concealed Scoop Speakers - Models 30.0215M / 30.0215P - High efficiency output. Nominal 375 - 8000 Hz. 120 dB - 10 feet on axis. 11 ohms at 1 KHz. Black metal or plastic scoop. Standard mounting bracket permits full axis orientation. Field-serviceable driver, voice coil, bell and tip. Works with any 100W siren. (Sold separately.) 4-1/2" H x 10-3/8" W x 4-1/4" D.