The Bluetooth Dongle, GP-MPPT-PRO-BT-1 is compatible with Go Power!'s Bluetooth ready GP-MPPT-PRO-60 solar controller and can work seamlessly with the Go Power! Connect mobile app giving you the ability to wirelessly monitor you controller's parameters setting and data view. Supports the Go Power! Connect mobile app allowing for simple set-up and plug and play functionality. Adopt Bluetooth 4.0 and BLE technology, has the characteristics of rapid communication and strong anti-jamming capability.