Durable battery disconnect switch and simple operation: Turn off and turn off the battery by pressing the On/Off button. Effectively solves these problems: leakage current and electricity loss, and extends the battery life. Quick battery disconnect switch, ideal for preserving battery charge over time. 4 battery master switches for wiring in the positive end. Make sure that only the battery is turned off, not the entire ignition system. The key can be removed if there is no electrical connection.