Please note several problems with this equipment: 1 - Not compatible with all smartphones: for example, with a Samsung S3 4G, can not connect, the message being "internet too slow" while I work with fiber. It works with other smartphones. 2 - Switching from the failover does not work every time. It often restart command several times .. 3 - Contrary to what you may believe, this device does not send mail after a power failure. He passes off position but without any feedback signal.