Balmar Battery Monitor Kit N2K BT Gateway Color Display 12-48VDC One Size. Incluses N2K Adapter cable.Features:Learns and displays all critical battery parametersSupports for all common battery chemistries and voltagesIntelligent self-calibrating accuracyLarge bright color displayExpandable architectureIncludes Display Shunt GatewayThis product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. Package Contents: Balmar SG230 Battery Monitor Kit N2K BT Gateway Color Display 12-48VDC Balmar SG230: SG230 Battery Monitor Kit N2K BT Gateway Color Display 12-48VDC One Size