Max. no. of phones:255 Installation type:digital, 2-wire Material:panel and keyboard made of stainless steel Dimensions:111 x 351 mm Installation method:flush (flush frame included) Power supply:12V AC lub 15V DC Power consumption at standby:~1W Output:to electric door strike, optionally I/O module Important features - operates multi-input systems- Master/Slave - stainless steel pushbuttons - heated digital LCD unit - outdoor devices control, for instance garage doors or lighting - small description field ACO