【Powerful Magnetic Anti-Drop】Each foot plate is embedded with 4 heavy-duty strong magnets for 30x stable adsorption. The durable housing firmly holds the amplifier in place and effectively resists inertia force during vehicle braking to prevent accidental falling off 【Equipped with Wired Microphone】Comes with dedicated wired microphone for clear voice amplification. Built-in recording and loop playback function enables repeated voice announcements, ensuring your information can be transmitted continuously 【Rich Audio Input & Bluetooth】Integrated Bluetooth module for stable wireless music streaming. It supports USB flash drive and TF card audio input, realizing music playback, voice warning and customized broadcast functions all in one unit 【Clear Loud Broadcast Sound Effect】Optimized audio module provides high audibility. Whether for temporary voice notice or repeated warning alerts, the amplifier guarantees loud and distinct sound transmission in complex outdoor driving environments 【Wide for Multiple Vehicle Types】Suitable for sedans, pickup trucks, large trucks, ambulances, fire trucks and more. Delivers reliable loud audio output to meet various vehicle voice broadcast and warning demands