Renogy BT-1 Bluetooth Module Solar Charge Controller Wireless Monitor PV System
Renogy N-Type 100W 175W 200W 320W 640W Solar Panel 12V Mono Off Grid RV Caravan. Renogy BT-1 Bluetooth Module (New Version). Renogy BT-1 Bluetooth Module. Two LED lights that indicate the BT-1's power and Bluetooth connection status.