Established in 2003, E-top has developed many variants products: Wired Room Thermostat, Battery Powered Wired Room Thermostat, Battery Powered Wireless Room Thermostat, FCU Thermostat and 8/16 zones Wired/Wireless Wiring Center, etc. Today we are going to talk about 8/16 zones wiring center’s function. 1. Wired wiring center: Basic Funtion: Heating device delay ( pump/boiler)--optional NO/NC--optional CO(Change-over)--optional Protect funtion--optional Each Zone can connect 4 valves, total acuator power<500W 2. Wireless wiring center Heating device delay (pump/boiler)-standard configuration NO/NC--standard CO(Change-over)--optional Any other function can be further added, please contact our sales expert via info@etopcontrols.com