Features:A voltage sensitive relay (VSR) is the best way to ensure you can always get your dual-battery vehicle started.The VSR connects and disconnects the auxiliary battery and the starter battery according to the current charge level while the engine is running, when the starter battery reaches 13.2 volts, the VSR will start after 15 seconds and the LED light will illuminate. This means that both batteries are connected and the system is running. Once the vehicle system is turned off, the two batteries will be disconnected when 12.8 volts is reached after another 15 seconds, allowing your main battery to restart safely.Voltage: 12V.Maximum operating current: 50A.Peak current: 70A.Specifications: Material:MetalCurrent consumption - charging: 150MACurrent Consumption - Standby: 1.5MAInsertion voltage: 13.2VCut off voltage: 12.8VBreakaway Delay: 15 secondsProtection level: water resistant protectionSize:Approx.84x42x37mm/3.31x1.65x1.46inNet Weight:113gPackage Includes: 1x Dual Battery IsolatorNote: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.