The Gate Opener/Relay Switch RTU5034 is an powerful GSM Relay, it is a very simple device which can be used for authorized door access, controlling gates, switching of remote equipment, car parking systems. Actually the GSM 3G Gate Opener/Relay Switch can be used in places which require to turn ON/OFF your system, machines, equipment remotely with a FREE call from your mobile phone. Just dial from Authorized User number at the specified time then the Barrier and doors are opened, or the machine are turn on or off by the GSM Gate Opener/Relay Switch. There are no call costs, the GSM Gate Opener/Relay Switch rejects the call from authorized number then carries out the turn ON/OFF action. Moreover, the user can be authorized at the specified time to operate it, after timeout, will automatically change to unauthorized type. The RTU5034 supports GPRS communication function, very suitable for remotely monitoring outdoor cabinets and stations of telecom company, traffic origination, power supply company and so on. It can be authorized different repair person or maintains person to open the cabinets or stations at the specified time, saving time to get the keys for the locks and saving cost to repair or replace the locks while the person lost the key. And also can remote monitoring the door is opened or closed, or illegal opened. Packing List: 2G Gate opener*1 Antenna*1 Shipping 1.If you need to buy in bulk, please contact, we will reply in 24 hours. 2.We are always working hard to ensure your package arrives as soon as possible. Please understand that some factors like weather, high postal traffic, and the performance of shipping companies are outside of our control. 3.Usually product Reaches after about 12-45 business days depending on destination. If you have not received your shipment within 45 days from payment, please contact us. We will track the shipment and get back to you as soon as possible with a reply. Refund or resend product will be offered if item still not received. 4.We maintain high standards of excellence and strive for 100% customer satisfaction! Feedback is very important. We ask you contact us immediately BEFORE you give us neutral or negative feedback, so that we can satisfactorily address your concerns. It is impossible to address issues if we do not know about them! THANK YOU :)