17 brilliant sounds including Westminster, pop, special call sequence for the hearing impaired, classical, and more. The sound can be changed from melody to alarm, making it ideally suited for use with motion detectors. For example, a melody can be triggered in a store during the day, while the alarm sound is activated at night. The volume is adjustable up to a maximum of 86 dB(A). It features 2-way call differentiation for optimum access control and a silence function with one-button mute and LED control. The user-friendly easyTIP operating unit allows for easy operation of all functions with a fold-out design element.