Features The voltage is automatically detected, and when the secondary battery is low, the charging function is turned on. With stable and excellent performance can be used to replace old or damaged relay module. Have humanized design, simple operation, easy to install, convenient to use and operate. Suitable for isolating the second battery, dedicated to protect battery life and prolong battery life. High current battery isolator, 200 AMP battery isolator and relay to prevent the load on the auxiliary battery from draining the starting battery. Specification: Item Type: Dual Battery Isolator Relay Material: ABS and alloy Purpose: Smart isolator Input voltage: DC 12V Continuous Current: 200A Peak Current: 300A Contact Switching Current: 3A Contact Switching Voltage: DC 7.8V Contact Form: Normally open Package List: 1 x Dual Battery Isolator Relay Note: Do not use it outside the current and voltage range. Package List 1 x Dual Battery Isolator Relay