Proximal Monitoring:Through the Bluetooth direct connection, only need the cell phone can be connected to the Internet, in the case of the device does not have a network can also view the device data. And with data, control, alarm, debugging functions, support for setting passwords to prevent others from connecting to the operation. Data :you can view the energy flow diagram and detailed parameters of the equipment, and the parameters be refreshed in real time; Control: you can issue control to the equipment, set the function and modify the data; Alarms: you can view the alarms that are happening in the device at the moment; Debug: you can directly send commands to the device; click the upper right corner to modify the data format of sending/receiving. Color: Black Material: plastic Package Contents: 1 x Wifi Module Only the above package content, other products are not included. Note: Light reflection 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.