GSM BASED RELAY ON/OFF SWITCH 1 CHANNEL TO 4 CHANNEL Remote control using a MOBILE phone from anywhere in the world! - New Feature - Schedule Timer Added The GSM BASED RELAY ON/OFF SWITCH 1 CHANNEL TO 4 CHANNEL is a GSM remote control switch, it connects to the cell phone network and like a cell phone has its own cell phone number. The GSM switch is activated by Sending SMS to its cell phone number, it has 1 TO 4 independent relay switches with normally open and normally closed switch contacts, these can be programmed to switch on and Off By Sending SMS A1 B1 C1 -A0 B0 C0 ..... . SMS text message command. It can report the relay status by sending back a text message. Applications Specification â?¢ Operating Voltage - 12VAC/ DC 2 Amps â?¢ SIM card any Network SPECIFICATION : POWER INPUT: 12v DC-2 Amps RELAY: 250v 7A, 24 10A LIGHT INDICATION: FIRST LED: RED- POWER LIGHT SECOND LED: GREEN â?? BLINK 2 SECONDS ONCE GSM CONNECTED TO NETWORK RELAY ON CORRESPONDING LED WILL GLOWGSM BASED RELAY ON/OFF SWITCH 1 CHANNEL TO 4 CHANNEL Remote control using a MOBILE phone from anywhere in the world! - New Feature - Schedule Timer Added Specification â?¢ Operating Voltage - 12VAC/ DC 2 Amps â?¢ SIM card any Network SPECIFICATION : POWER INPUT: 12v DC-2 Amps RELAY: 250v 7A, 24 10A LIGHT INDICATION: FIRST LED: RED- POWER LIGHT SECOND LED: GREEN BLINK 2 SECONDS ONCE GSM CONNECTED TO NETWORK RELAY ON CORRESPONDING LED WILL GLOW