It can match with 40 pagers and remotely controller to work * High brightness LED light display,with voice prompt, ding dong or music are optional, 12 polyphonic ringtones for choice,16 level volume can be adjustable * Single-key and multi-key pager can be identified automatically,can be mixed to use * 40 indicator light stands for the statu of 40 routes of pagers * use single-key pager to call, press the corresponding operation key on the keyboard to cancel the calling message