Condition:New Type:Voltage Regulator Voltage:9 V-36 V,when using 9 V power supply,the current requirement is above 1A Relay interface:Use 250 V 10A relay,you can directly control most of the electrical devices on the market. SIM card Socket:SIM card when system is switched off. LED interface:there are three LED lights called D3 D6 D7 (D7 is close to the positioning hole,d6 is close to the antenna interface).LED indicator condition corresponds to the equipment working conditions are as follows,each column is a state Application Agricultural land irrigation Greenhouse Server room Feeding the pet Oxygen pump Roller shutter Colour: blue Material: PC+metal Package Contents: 1 * Module Only the above package content, other products are not included. Note: Light shooting 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.