RTU5015 GSM Remote Gate/Door Opener:The GSM Gate Opener RTU5015,updated from RTU5024 is a very simple device which can be used for authorized door access, controlling gates,switching of remote equipments, car parking systems. Actually the GSM Gate Opener RTU5015 can be used in places which require turn ON/OFF your system, machine, equipment remotely with a FREE call from your mobile phone. 2 Digital Input (NC/NO, dry contact) Can use for Water Level Detector, Gas Detector, Smoke Detector, PIR Motion Detector, Door Magnets Sensor.etc. Material:Metal + plastic colour:Silver Package Contents: 1 * Gate opener 1 * GSM mount Antenna Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.