With basic functions such as calling, speech, door opening, and floor call. It features an electronic call generator with a triad chime and alpha tone for door calls, and a continuous tone for storey calls. Performance features include a potential-free door opener and light button, an integrated audio privacy function for all applications (assignment as required), and an electronic call signal with door/floor call differentiation, alpha, and continuous tone. The call volume control is infinitely variable, with a maximum of 83 dB(A). It includes a plug-in handset for easy mounting and conversion for desk mounting with corresponding accessories. Technical data: Contact type: 2 NO contacts 24 V, 1 A; Dimensions (mm) W x H x D: 91 x 201 x 46.