SINGCALL Wireless Calling System,Classic Pager System With Transmitter of APE100 and LCD Screen Receiver of APE1500. APE 1500: 01.Display a group of three-digit, with voice reporting function 02.Each pager can set different chord music. Twelve beautiful chord music. 03.With a 999 call extension, it can be displayed in English or figures 04.The display time length of the call number can be set arbitrarily 05.Length of call sound can be selected APE100: 01.A new generation of multifunctional take number device 02.Supporting - fluid dedicated hosting and WanShi watch 03.Can realize any call number, can continuous call and repeated call 04.Can a single call and also can group call Frequency: 433MHZ With Pager Quantity: 999PCS Specifications: 9.72*6.26*1.46 inches (247*159*37mm) Receiver Sensitivity: -114dbm Power Supply: AC220V/50HZ-DC12V/1A The Simultaneous Display Of Number: 1PC Letters Show: A.B.C.D.E.F.H.P(80 in English) Power Supply:12V 1A Radome Color: Silver Frequency deviation: 0.5 MHZ Frequency:433.92MHZ Transmitting distance: 130-200ft(40-60m) indoors, 1600-2600ft(500-800m) in the open air Specifications:5.24*3.43*1.02 inches(133*87*26mm)