[Innovative Design] Mounts flush with dash; can also mount on top of dash with universal mount bracket (sold separately) [Clear Read for Power Level] Color-coded face with needle indicator makes power level easy to read [Easy Installation] Instructions included so installation can be completed quickly The 48-Volt Analog State-Of-Charge Meter is a convenient tool. It helps to understand how it works to be able to use it properly. This is a charge indicator, not a voltage indicator. It reads the voltage but only a threshold and not how you would imagine it. Let us see if we can elaborate. Suppose you have a multimeter at home. You put the positive and negative leads on the cart's main positive and main negative battery posts. In that case, it should read 48 volts or better. Even if it's dead.