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These suspended, strongly pointed spherical speakers are specially designed to be suspended from the ceiling by connecting cables. They have an excellent range of sound transmission and are therefore ideal for high-ceilinged buildings such as shopping malls and supermarkets. LS1 UC20E?1 is a powerful 20 W suspended spherical loudspeaker with high quality voice and music playback effect. The advanced design not only suits the environment of modern style, but also suits the environment of traditional style. This loudspeaker is suitable for voice evacuation system. Basic function voice alarm loudspeaker voice alarm loudspeaker is specially designed to be used in buildings that have many strict requirements on the performance of the voice broadcast system. LS1?UC20E?1 is designed to be used in the voice alarm system and is certified by EN 54-24 to meet BS 5839-8 and EN 60849 standards. The speaker has built-in protection. In case of fire, this protection function can ensure that the damage to the loudspeaker will not lead to the failure of the circuit connected to it. In this way, the integrity of the system is maintained to ensure that the loudspeakers in other areas can still communicate to people in a timely manner. In addition, the speaker comes with a ceramic junction box and a temperature fuse. Perfect sound quality and high quality drive unit combined with advanced filtering function can produce extremely natural sound reproduction effect and excellent bass response. All Bosch loudspeakers are certified to meet IEC 268-5 power amplifier (PHC) standards and can operate continuously for 100 hours at rated power. Bosch has also conducted simulated acoustic feedback exposure tests to ensure they can withstand twice the rated power in a short period of time. This ensures higher reliability in extreme conditions, improves customer satisfaction, extends service life, and significantly reduces the chance of failure or performance degradation. Safety, like all Bosch products, is carefully designed to ensure compliance with stringent safety standards. All ABS components meet UL 94 V 0 standard for flame retardant performance. This strong pointing speaker meets the safety and installation requirements of EN 60065 standard. Waterproof and dustproof comply with IEC 60529, and the IP 65 standard urgently conforms to EN 54-24 /BS 5839 -8 /EN 60849 regional certification European CE DOP CPD