Barely used NGC Sky Vector Digital Setting Circles from Lumicon. See their website for details on device. Included is the DSC computer module, two 8192 step enhanced precision encoders, mounting brackets for 8" meade SCT, serial computer cable and manual. Encoder mounting brackets for other telescopes available from Lumicon. Invested $489+29+25. Priced for quick sale at $325 (includes shipping to CONUS only).