Cloud-Box-M1 WiFi Communication Module Data Monitor Use for Esmart3 Wiser MPPT Solar Charge Controller ship from China, will deliver in 5-15 days.Monitoring the data of your solar system, include solar panel/battery/Load information, working mode, Parameter Support set your Charging/Protection/Load Parameter configeration. Support esmart3-40 solar controller & esmart3-60a solar controller. Easy step to use this wifi box, and support Monitoring your solar system from other city or place. 2 years warranty, and quick response after sell support. Meet any question during use, just contact us directly. We are glad to help you.