Health Spas Calling System K-403+AB 1. Can show 3 digit number 2. Easy to install and operate ... : T/T, Western union, Paypal, EscrowWarranty: 1 yearFAQApplicationsWireless paging system can be used in restaurants, hotels, hospitals, casino, tea house, coffee ... salon, spa center, bars, swimming pool, beach, etcWhat are the components of the wireless calling system?1. Wireless receiver, installed on ...