1Function: Power on off battery switch prevents any current from being drawn from the battery when your Rv, boat, or car is not in use. 2Safe Disconnect: The battery disconnect switch can eliminate any power consumption from the battery and safely disconnects the battery. 3High Strength: Switch is made of premium Abs, brass and iron, which is not easy to age and resistant to wear and tear, ensuring maximum strength and durability for long term use. 4Easy Operation: The simple design is easy to operate, simply turn the knob to either the on or off position, fully meet your usage needs. 5Features: The switch is designed with a cover at the top for dust and wear resistance, high reliability, compact size, simple and modern appearance.