Patlite ehv-m1tg mp3 smart alert, user programmable, off white, dc12v to dc24v patlite’s new mp3 smart alert horn is a fully-loaded melody/alarm and message player for industrial and commercial applications. Its adjustable high volume output, strong vibration resistance, sound reduction, and other features make it suitable for a variety of applications from public spaces to noisy, vibrant factories. features: despite the smaller size, it can deliver a maximum of 110db (at 1m) for alarms and melodies, and 105 db for voice messages vibration resistant to withstand up to 4.5g force available with cable connection or terminal connection various playback modes and commands make it suitable for a wide variety of applications can be used with either pnp or npn transistor driven inputs it complies with europe’s environment-friendly rohs directive protection rating of ip65 (refer to manual for more details) the use of the sd card can allow changing messages while out in the field listed by underwriters laboratories inc conforms to the ce requirements.(ehv-m1 only)