The Dual Battery Isolator 12V 140Amp with Voltage Sensitive Relay VSR is a high-quality, automatic push-button switch designed for connecting and disconnecting dual batteries in your vehicle. With a current rating of 140 Amps and screw terminals for easy connection, this product is perfect for ensuring that your vehicle's batteries are properly connected and protected. Made with stainless steel contact material and a durable construction, this gold-plated isolator operates at 12 volts and is compatible with a wide range of vehicles.