Meade's declination motor that plugs in to the control panel on a Meade LX-10 and operates from the LX-10 handbox. It is the same unit that is standard with the LX-10 Deluxe and optional with the LX-10. Works fine and I'm selling it because I rarely use it. New about $75. Sell for $40 including shipping in CONUS. Postal MO or bank cashier's check. Thanks.