1.Realize the solar controller of wireless monitoring function 2.Support mobile phone APP, plug and play,simple setting 3.The use of high performance,low power consumption of thebluetooth special chip 4.Adopt bluetooth 4.0 and BLE technology,has the characteristics ofrapid communication and strong anti-jamming capability 5.Without external power supply,power supply directly by thecommunication port Communication distance of up to 15 meters Type: BT-2 Input voltage: 5V-12V Stand-by power consumption: 0.04W Run power consumption: 0.05W Communication distance: 15m Serial port baud rate: Fixed baud rate 9600bps Communication methods: TTL Interface type: PH2.0 Connecting line: Standard Ethernet cable(parallel line) Fixed holes diameter: 3.5 Operating temperature: -20-75 Colour:black Material:plastic Package Contents: 1 x BT-2 Bluetooth 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.