Wakespeed WS500 Advanced Alternator Regulator - Configurable Kit Included items: WS500 unit (no wiring harness). For a functional system, you must add one of the wire harness options listed above Other items may be needed and can be added above, or they can be purchased individually here:  WS500 accessories.   The Wakespeed WS500 Buyer's Guide is available here:  https://www.solar4rvs.com.au/battleborn-wakespeed-ws500-buyers-guide Tech support...