This series of speakers are fully waterproof products made of aluminum and plastic speaker tubes (body). The ferrite magnet external magnetic speaker head is designed and used with high efficiency and wide sound range. It has passed the waterproof IP66 level certification and is widely used in public places such as hotels, restaurants, airports, office buildings, churches, and ships. For this reason, PA speaker products can be used as part of the voice alarm system to provide alarms to people in or near buildings where fire emergencies occur, and enable these people to take predetermined measures to evacuate the plan. 2. TC series are aluminum-mouthed horns, with the same appearance design and round shape.