Check the listing for details. Renogy Bluetooth Module RJ12 Communication Port BT-1 RS232 for Charge Controller. Condition: New. Listed at 29.99 USD. Powered directly through RJ12 communication port.Signal range is up to 82 ft.Package Include: BT-1 Bluetooth Module x 1Cable Length: 16.4ftDimension: 2.65 x 1.38 x 0.55 inWeight: 0.29 lbsInstallation Dimension: 2.66 φ 0.14inBT-1 Bluetooth Module (New Version)DescriptionThe Renogy BT-1 is a great addition to any compatible Renogy solar charge controllers. Powered by its RJ12 communication port, the BT-1 provides wireless monitoring of system data through the Renogy DC Home smart phone App. And allows users to change parameters when using the Renogy DC Home App.SpecificationInput Voltage: 5VStandby Power Consumption: 0.04WOperating Power Consumption: 0.05WSerial Baud Rate: Fixed Baud Rate 9600bpsCommunication Protocol: RS232Port Type: RJ12Operation Temperature: -4°F to 185°FRenogy DC Home APPCompatible Charge Controller