12V, 140A, 13.3V cut-in voltage, 12.8V cut-out voltage; Include All the and Pieces Needed for a Complete InstallationWorking Voltage: Having Voltage Sensitive Chip,Rely Cuts in at 13.3 Volts and Cuts out at 12.8 Volts to Ensuring Primary Battery is Always for Vehicle to Run.Fuction:Like Having Two Separate Power Sources,The Dual Battery Isolator Kit Enables Your Accessories to Run From a Separate Battery While the engine is not running on your vehicle While your Main Battery and Your Vehicle Always to Go and When You It.Compatibility: This battery isolators are small and suitable for anywhere, for ATV, UTV, Boats, RV's, vehicle, truck, colour: blackMaterial: ABSPackage Contents:1 x Dual Battery IsolatorOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed error is +/- 1-3cm.