GSM Frequency Band: 850， 900， 1800， 1900You can easily control any one of your home electrical equipment through just a text message or a phone callTransfer gate can be easily controlled when you don't want to do it yourselfRemote control the server， router， and large-scale switch equipmentNo run around any more for possible sporadic faultUnmanned base stations， remote detection point， forest protection， electrical equipmentTrue all-weather controlIrrigation， fish pond aeration， seaside raft work， automatic animal feed， etcAgriculture automation applicationsetcFree Call to controlUser can control the GSM controller by dial the SIM card number of GSM controller. The user may hear" You can't answer the phone call， beep， beep.......tone etc"， which mean changing the relay state sucessfully.If the controller connected， it will change to be disconnected state after a call.If the original state is off， it will change to be connected state after a call. Button ControlThe controller state will be changed when you press the SW button at side of controller.If the controller connected， it will change to be disconnected state.If the original state is off， it will change to be connected state.User can send sms to check the on/off stateSMS text: SN+Password+CHECKWith Power off memory FunctionSpecifications: Material: Aluminium alloy caseOutput: electric current 10A ， voltage 10A/220V， 15A/125v/30v， max. output power 2200W (inductive load reduce half)Input: voltage: 9-12v， input power: 0.9wSize: 11.3*6.5*2.8cmAdaptor: EUplug， input: 110-240v， output: 12v Note:SW button: Control relay status， press it to get the status flippedSET button: Press SET button， then user can set master number in manual modeSTA indicator: Indicator of current status of relay: if status is on， light on; if status is off， light off.GSM network indicator: Signal indicator， it means accessing the network when light flashes every 4 seconds.Package included:1* Remote GSM Controller1* Adaptor (EUplug)1* Antenna1* User Manual