EN 54 certified 20 W Unidirectional sound projector intended for high quality speech and music reproduction in indoor and outdoor applications.- Rated Power: 20 Watts, Power Tapping: 20W/10 W – 5 W - Effective frequency range(-10 dB) :75 Hz to 20 kHz- SPL at rated power (1Khz at 1 m) 100 dB- Opening Angle 1 KHz / 4 KHz (-6 dB):220° / 65°- Self extingguishing acc. to UL94 V0Water and dust protection according to IEC 60529, IP 65IP44C as verified for EN54-24 by CNBOPEmergency according to EN 54? ??24 / BS 5839 8 / EN 60849