The FW/GD04 Communicator is designed to provide wireless communication for control systems. It can be connected to peripheral devices such as intruder alarms, CCTV equipment, access control equipment etc. The communicator has a built-in switch remote and allows SMS text messages to send instructions to the device. The FW/GD04 Communicator allows up to 50 telephone numbers that can send and receive messages to and from the device. Main Features: SMS remote control. SMS texts for switching particular terminals on/off Time-switch which can be activated remotely via a mobile phone Relay with dialling-in remote control. Up to 50 telephone numbers can be authorized for each relay SMS reporter Technical Specs: Features: FW/GD04 Inputs: 4 Outputs: 2 x Relay 250v 0.5A SMS Message Delivery: 4 Activated & 4 Restore Call Alert Delivery: Yes Telephone Numbers: 8 (per input) SMS Relay Control: Yes Programmable via Web: Yes Programmable via USB: Yes 1 Year Guarantee Included