... Waiting List Management,Nurse Paging System,Doctor Paging System,Nurse Call, restaurant guest paging system Y-A3-WO Guest Paging ... Frequency:433MHz±75kOutput power:<20mW size: ø60x17mm ApplicationsWireless calling system can be used in restaurants, hotels, hospitals, tea house ... swimming pool, beach, etc What are the components of the wireless calling system?1. Wireless receiver, installed on the count ...