12-24V Industrial Waterproof Fire Horn Siren Alarm Audible Visual Sound Warning Alarm Speaker This kind of small horn alarm with beacon lamp is power-on playback type, that is, once the power supply connected, the device will immediately play the sound, which can make the emergency known. It is an important audible and visual alarm device, which sends out alarm signals through alarm sound and flash, widely used for voice reminder, giving safety prompt, public broadcasting, fire safety prompt. Features: Built in 10W horn: give 110dB alarm sound when be triggered. Baking finish steel plate, cold rolled steel material: Waterproof, dust-proof, sturdy, and long service life.  Flexible installation: it can be wall mounted, hoisting or seat installed or other ways you like. High-frequency Flashing Light: LED Light Flashing, high luminance, low power consumption. Audible and Visual Alarm: This alarm device is combined aural and visual alarm,giving warning signals through alarm sound and flashing light to make the emergency situations known. Built in USB flash disk: sipport copy voice files directly, so you can download some alarm music you like. Infrared remote control used within 5 meters: the device itself has no buttonsoperated by remote controller. The manager can use remote controller to adjust parameters and adjust volume, select audiovolume down or up, play the next or the previous. Specifications: Power voltage: DC12V-24V Trigger mode: power-on play Play mode: single track Volume:110dB Built in horn:10W SD Card: Built in 32Mbit Flash memory Card Update voice: copy via USB flash disk (insert USB flash disk to copy voice files directly)Battery type: 1 x CR2025 Button Battery 150mAh (Included) Size: 29.0*11.5*13.0cm/11.4*4.5*5.1in Package Weight: 1335g/47.1oz      Package List: 1 * Horn Siren 1 * Remote Control 1 * User Manual