Original Discontinued you will receive new MSPA Repalcement Board with transfomer and probes The domestic update kit is designed to replace a number of earlier circuit boards. The kit includes a new transformer, sensor and instructions. If replacing a Baja TSPA board, please request the Circuit Board Standoff Installation Kit in the checkout comments field. HQ PCB Deluxe Series 120v Rev 5 (Prior 5/03) Horizon # 59-355-1100 Manf. Hydro-Quip Manf. # 33-0010-R5