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Mode 4 

Pin D2 is LOW and pins D3 and D4 are HIGH in this Mode.

A short call with back light on for under 20 seconds will turn the socket for just 30 sec. This Mode is ideal for turning ON the socket with an automated text.

The socket should turn ON immediately.

See Mode 1 for explanation of backlight timings.

See AUTOMATIC OPERATION OF SOCKETS.

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