You can control any electricity from outside of your house , just call to your home telephone, press the passcode , then you can on/off 4 Relay.

Technical information:
-Require supply : 12 V AC/DC ( Not comes with the board )
-Consumption : 150 mA max. Stand by at 20mA
-Access to the board with passcode 4 digit , User can change the passcode
-Programmable ring tone count from 1-12 times.
-4 relay outputs. ( Latch mode only )
-1000 watts maximum output load per channel.
-Dimensions : 8cm x 8cm or 3.18" x 3.18"
-Including the schematic and English manual

NOTE: In case, board was power off, pass code will be clear and back to default pass code.  Ring tone count will be not clear

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