This is a Tangent Instruments BBox device that connects encoders (not included) to a pc planetarium program. It includes two serial connectors: one labled "LX200 Autostar", the other "BBox/SGT (this is the one I used to hook up to my laptop).
Includes encoder cable. 6' of cable to az encoder and 4' of cable for alt encoder.
I accept PayPal, checks and money orders. Item will be carefully packed.