Horn Siren,Alarm Horn,Car horn, horn speaker 1.Built-in audio ... audio output 3.built-in SPI-flash Re-programmable Horn Siren,Alarm Horn,Car horn, horn speaker FeaturesAudio format : wav , 16bit ... pruduct------------------Guangzhou Waytronic Let sound change life-------------------- Re-programmable Horn Siren,Alarm Horn,Car horn, horn speaker