... *150*50mm 4)With pager quantity :180pcs Wireless call bell systemAn extemal power amplifier and the ... ringtones is richer than monophonic ringtones’, there is a strong three-dimensional feeling, compared to the ... Singcall chord music is more representative. 04 With a 180 call extension, can be displayed in English ... quantity : 180pcs Letters show: A,B,C,D,E,F,H,P(80 in English) Wireless call bell system