Description: Efficient Power Management: This dual battery isolator ensures that your vehicle's main battery is ready for operation without draining power from the battery and electrical systemEasy Installation: Designed for quick and convenient setup, this Voltage Sensitive Relay (VSR) comes with a mounting plate/template, allowing you to complete the installation in no time with simple power line input and output connectionsInstructions for Use:When the voltage of the main battery is greater than 13.3V, the main battery charges the auxiliary battery; when the voltage of the main battery is lower than 12.7V, the main battery and the auxiliary battery are disconnectedMaterial: Made from nylon, copper, and circuit board materials, this isolator is sturdy and withstand demanding conditionsDesign: The upgraded 1.5 version of the dual power isolator uses an imported power management chip, which has a relatively novel electronic circuit intelligent automatic management function. It also has the characteristics of strong waterproofness, low loss, good heat dissipation and high efficiency Specification: 6.8cmx6.8cmx5.2cm/2.68inchx2.68inchx2.05inch Size Chart: Continuous current: 100-120AInstantaneous current: 160ACurrent consumption - charging: 250mACurrent consumption - standby: 8mAWith anti-reverses connection functionAmbient temperature: -20Degree -50 DegreeDisconnection delay: 5-10sRecommended fuse: 80AmpStud: M6 copper screw nutSurges protection: built-in Package Includes: 1Dual Battery Isolator Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.