Specification:LCD remote MonitorThe external display can display the voltage of two groups of batteries, solar panel voltage, charging current, charging energy WH, charging ampere hour AH, battery temperature, battery priority order in real time. Please refer to the display manual for specific instructions.Bluetooth DongleWith an external Bluetooth adapter, the controller is connected to the mobile phone APP through Bluetooth, and the charging parameters are sent to the mobile phone. The customer can view the controller's parameters(effective distance 10 meters), including battery voltage, solar panel voltage, charging current, charging WH, charging AH, and history records and fault promptsAPP includes Android version and Apple version, free to useFor specific instructions, please refer to the Bluetooth adapter manualSEARCH "CHARGERCONNECT" ON app store.CONTENTS IN BOXMPPT 30A DUAL CONTROLLERREMOTE LCD METERBLUETOOTH DONGLE.Note:Photo color might be a little different from the actual product due to color display of different monitors.Packing Included:1 x Solar Charge Controller