SINGCALL Nurse Calling System,Wireless Paging System,Pack of 10 Bells and 2 Watch Receivers and 1 Display. APE9300: 01. Display three groups of two-digit. 02. Each pager can set different chord music. Twelve beautiful chord music. 03. With a 180 call extension, can be displayed simultaneously in English and figures. 04. The display time length of the call number can set arbitrarily. 05. Length of call sound can be selected. APE6600: 01. Without any host or control center, directly receive signals of pager. When the mantissa is 1,means Order, 2 means Drinks, 6 means Service, 8 means Bill. 02. With manual / automatic power saving function. 03. Two prompt modes of vibration and music. 04. LCD display, with sleep function, effectively extending the standby time. 05. Showing a group of three digits, storing ten numbers, scrolling display. APE560: 01. Equipped with waterproof base. 02. Stable login mode. 03. Anti-temperature and humidity changes. 04. The number can be changed optionally with strong re-use ability. Frequency Range: 433MHZ; Receiver Sensitivity: -108dbm With Pager Quantity: 180PCS Specifications: 9.45*9.45*1.57 inches(240*240*40mm) Power Supply: AC220V/50HZ-DC12V/1A The Simultaneous Display Of Number: 3PCS Letters Show: A.B.C.D.E.F.H.P(80 in English) Specifications:2.17*1.77*0.71 inches(55*45*18mm) Us Frequency Range:433MHZ Sound Type:Music/Vibration Standby Time:30 days long With Pager Quantity:999PCS Receiver Sensitivity:-114dbm Power Supply:AAA battery Call output: 20db UV/m, Frequency: 433MHz, Frequency deviation: 0.5 Mhz Specifications:2.36*2.36*1.26 inches(60*60*32mm) Call distance: 130-200ft(40-60m) indoors, 1600-2600ft(500-800m) in the open air Power Supply: Alkaline Battery 12V 23A