Everything you need for a complete installation is included!Includes:Dual battery isolator relay12” Black ground battery cable with terminal lugs12” Red positive battery cable with terminal lugs18” Red positive battery cable with terminal lugsDual Red LED voltmeter (1.4” OD x 1” depth)Keyswitch voltmeter activation relay with socket and wires96” wire harness for dual voltmeter connection to relayTerminals and connectorsAnd the other parts of the kit :Dual output statorFlywheelFlywheel PullerTwo SERIES voltage regulatorsTwo automotive grade relocation wiring harnesses with OEM-quality heavy-duty connectorsComplete instructions for voltage regulator relocationGasket