The MT Solar Remote Display III in black is equipped with a large LCD display and many additional functions: Displayed: Charge current (A), system voltage (V), charge function, solar power as bar graph as well as time and date. The current counter function (Ah and Wh) can be used to read how much capacity has been passed on to the battery. A switching output for free programming is also available. With 5m connection cable. ATTENTION!: The display can only be used with a charge controller from Büttner.