1、Universal Fit: Battery disconnect switch is designed to fit universally in 12V ‑ 24V batteries. This makes it suitable for a range of applications including Cars, Vans, Boats, and RVs. It's as simple as turning the knob to disconnect and reconnect your battery. 2、Sturdy Construction: The power on off switch features a built in fuse and robust pure copper, supplemented with a copper bolt and nut. Additionally, the red knob is fixed and cannot be removed. Equipped with a spring, the switch is extremely secure. 3、Isolation and Protection: This battery killer switch can be used independently or in conjunction with other switches. It serves to isolate and guard electrical systems ranging from 12V to 24V, effectively enhancing the safety of your devices. 4、Accurate Power Control: This switch can act as an on off button for various electrical equipment added in your vehicle or boat, such as strobe lights, chassis lights, fog lights, and top lights. It also facilitates instant power cut off when necessary. 5、Safe and Reliable to Use: The Battery Disconnect Switch provides an effective safety solution by disconnecting power from your battery when your car or boat is not in use, eliminating any drain on the battery.