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-GSM switch or key, storing up to 1000 telephone numbers of users who can ring the unit to gain access.

-Complete with volt free output which can be used to trigger gates or release door locks etc.

-Also suitable for external and internal security systems or control of central heating systems.

-1 volt free relay output, selectable as either momentary or latching.

-1 input for status notification or alarm notification etc.

-2 year extended warranty.

Only £186+vat