REMOTE CONTROL switch an relay ( any electrical equipment ) with a phone call via GSM

ET 30 is a home made device, built with quality components, which activates an relay with a simple phone call and works in two modes: toggle ON/OFF or momentarily. It is very simple to use and has many applications. Dual operation mode: MODE 1: toggle ON/OFF; MODE 2: ON with auto turn- OFF or OFF with aoto turn- ON Turn equipment ON and OFF from a random place via your cellular phone .... toggle ON/OFF or momentarily For more device see : http://www.ebay.com/usr/electronictricks