• HEJ-RELAY -4 IP to Relay Getaway works with the Smart Home Enhanced Control Center. 
  This gateway is an extended module of the Smart Home Enhanced Control Center. 
  Through the cloud Home application, users can control switchgear equipment. 

• HEJ-RELAY- 4: 4 Relay output modules (each 10A), in the intelligent home system 
  HEJ-RELAY -4 can used to control some special equipment, such as electronic valves.