Check the listing for details. Mighty Mule Gate Opener Replacement Transformer (RB570). Color: Black, Condition: New. Listed at 58.19 USD. Mighty Mule Gate Opener Replacement Transformer (RB570) PRODUCT DETAILS: Product Description The RB570 is an 18 Volt AC transformer for use with many Mighty Mule automatic gate openers. The transformer maintains battery backup by providing a trickle charge of power to the gate opener battery. Compatible with the Mighty Mule300 and 500 series. From the Manufacturer The RB570 is an 182500, PRO-3000, and PRO-4000. Features: This 18 Volt transformer provides a constant charge of power to the gate opener battery through the control board. Used to maintain a battery charge by providing a trickle charge of power to the gate opener battery. Easy DIY (do it yourself) installation or replacement For additional power options, Mighty Mule offers the 5-Watt solar panel kit (FM121) or the 10-Watt solar panel kit (FM123) as a replacement power source. Backed by a 12 month Mighty Mule warranty and Technical Support. PAYMENT SHIPPING RETURNS We only accept payment through PayPal. This is to ensure that all of our buyers qualify for eBay Buyer Protection. Most orders are shipped within 1-2 business days with standard shipping and tracking. A tracking number will be posted as soon as the item has shipped. Please make sure to provide the correct shipping address during checkout as the address cannot be changed afterwards. We are not responsible for any incorrect or undeliverable addresses. We do not ship to PO/APO Boxes. We offer easy returns on most items within 30 days of delivery for a full refund.