DescriptionModel Number : F71Brand Name : KERUIOrigin : Mainland Chinais_customized : YesOperating frequency : 433MHzEmission current : 20MATransmission power : >18dBOscillation resistance : 220KModulation method : FSKName : Calling BellKERUI Wireless Calling Bell Pager Call Button Transmitter Calling System For Restaurant Hotel Pager 433MHz Restaurant EquipmentWireless Calling Bell Pager System Signal Transmitter for Calling SystemItem InformationOne Button calling bell transmitter1. Size: 58*58*28mm2. Wireless coding: PT1527, EV22623. Frequency: FSK4. Wireless distance: 100M in open area5. 1 button: CallPackage contentPagers button*1(battery include)PS:This wireless calling button can not work alone,it must work with our alarm system.MoreOur systems detailWith thiswatch pager system, it will make ,our life more convenient with harmony.Thiswatchalwaysworkswiththecallingbutton,for the calling button, you can buy additionally.For the button in this set,we will provide the Hambergur button with the most common use If you need other type of button,please contact us.Kerui--- The most well-known brand in China for theSecurityAlarm System Field in China. We promiseto offer the most qualified products for our customerswith the high technologyand with our best service