EPEVER MT52 remote meter compatible with only EPEVER controllers: Tracer-AN, Tracer-BN, TRIRON-N ,LS-B, LS-BP, VS-BN, eTracer, iTracer and other series solar charge controller ,not fit for others brand controller. Clearly showing: With Large-Screen LCD Display, it can display important charging parameters such as voltage, current (separately for solar panel / load), battery state of charge, total charge / discharge energy, max and min values etc in the form of numbers ,graphics and text. There are six navigation function buttons for intuitive, convenient and fast operation. Diversified load control modes : Manual Control, Light ON/OFF, Light ON+ Timer, Time Control . Battery type selection: Gel, sealed, flooded and User Programmable parameters . This MT50 can connect real-time display of device fault information and voice alarm. Based on RS485 communication bus, communication distance is longer. If you need customized length, please contact us by email. Automatically identify and display the type, model and related parameter information of the connected controller. No external power supply is required, and the data line connection controller can directly supply power to the liquid crystal display unit.