The ELK-110 Voice Driver features high quality digitally recorded voice messages and loud attention getting siren sounds in an economical, low current draw, compact package. It features two input channels, multilingual voices, and many unique options which allow it to be used with virtually any residential or commercial alarm installation. The MilliMiser option allows the already low current draw to be further reduced for controls with limited alarm output power. Combo Trigger allows controls which have a single alarm output and pulsing option to activate both the burg and fire alarm sounds. The Volume Step option is best described as the "peacekeeper", since it causes the siren sound to start at low volume, gradually increasing over 90 seconds to maximum volume.