[Display Voltage of Both Main&Leisure Battery]The Upgraded Dual Battery Isolator has a built-in display screen. After connecting the battery, the display screen display the voltage of MAIN Battery and Leisure Battery. [Voltage Setting Function]Efficient voltage management allows you to freely adjust the CUT-IN/CUT-OUT voltage for different types of batteries. [Fit All types of Battery]Fit for Lithium Battery, Lead-acid Battery, Battery etc.. [Manual/Automatic Modes]This 3rd generation battery isolator also combines both automatic and manual modes. You can switch between any mode to suit your needs. [EASY TO INSTALL]The VSR split charge relay kit comes with full installation accessories and cables that easy for users to install it independently to vehicles, boats, recreational vehicles, and other equipment. Color: Black Material: plastic Package Contents: 1x Dual Battery Isolator Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.