Amazon.com : Bundle of PENTAX KF APS-C Digital SLR Camera Body kit + PENTAX O-GPS2 Handy GPS Unit with ASTROTRACER, Simple Navigation, Electronic Compass. Simplified Weather-Resistant Construction (30364) : Electronics
Pentax O-GPS1 GPS Unit Review | ePHOTOzine
Excellent+++] Pentax GPS Unit (O-GPS1) w/ Box | eBay
Pentax O-GPS1 GPS Unit (K5,K-R,645D) at KEH Camera