Features 1Easier Control: High efficiency and low consumption embedded special Bluetooth chip is used to monitor and control the compatible solar charging controller through wireless Bluetooth connection. 2Stable Signal: Bluetooth 4.0 and BLE technology provide fast and uninterrupted communication, featuring fast communication speed and strong anti interference capability. 3Reliable Working: No additional power supply is required, and power is supplied directly through TTL communication port. The signal range can get to 15m, very convenient and fast. 4Practical Use: Only suitable for SR MC series solar controller, supports mobile phone downloading APP connection, and can monitor solar charging anytime and anywhere. Ideal for home solar photovoltaic system, RV solar photovoltaic system, etc. 5Easy to Install: Comes with a light weight and a compact size as well, the Bluetooth adapter is very convenient to install, which can be quickly finished in minutes. Specification Item Type: Bluetooth AdapterMaterial: ABSStandby Power Vonsumption: 0.04WOperating Power Consumption: 0.05WCommunication Distance: Approx. 15m / 49.21ftSerial Port Baud Rate: Fixed baud rate 9600bps. Communication Mode: TTLInterface Type: PH2.0-4Connection Line: Standard network cable, parallel line. Working Temperature: -20 - 75Protection Grade: IP52Application Range: For SR MC series solar controller. Package List 1 x Bluetooth Adapter1 x User Manual