For monitoring, the device is a great alternative in caravans, smaller yachts and motor homes for which the Victron Energy Color Control GX or Venus GX are a step too far. Can work as a Voltage- and Temperature-sense device for the Victron Energy inverter/charger. When installed, use the VictronConnect app to monitor operation and also operate the system: change the input current limit as well as switch between Off, On and Charger-only mod. The bluetooth accessory for Victron Energy range of inverter/chargers: Multis, MultiPlusses, MultiPlus-II, MultiGrid, MultiGrid-II, Victron Energy Quattros, and Phoenix Inverters with a VE.Bus port. Victron Energy VE.Bus Smart dongle is two products in one: bluetooth accessory and Voltage, Temperature-sense device.